Compare: LG 55 B4 vs LG QNED91T6A

LG OLED B4 is an exceptionally versatile device in the semi-premium category. For how else can you describe an OLED television that is so well-priced, and whose price, as history shows, will quickly drop? Perfect blacks and contrast are two things that inevitably hypnotise, and we are sure that anyone who has ever owned a device with this panel will not be able to return to LCD units. The brightness results of the TV in HDR content may seem quite low, however, in this case, due to such a panel, they will appear optically much higher. It is worth noting their stability and uniformity in practically every scene. In this case, a minor downside is the brightness of full-frame content filled with a lot of white. However, we do not consider this a serious issue, as there are not many such instances. The factory colour reproduction also deserves praise, which in our unit is quite decent, but one cannot help but recall the beneficial effect calibration had on the image, allowing the director's intentions to be conveyed in full. LG B4 will be an excellent choice for all sorts of gamers, as well as sports fans. The former will certainly appreciate the rich support in the form of all the conveniences arising from the HDMI 2.1 standard. Meanwhile, the latter will enjoy the advanced motion smoother with multi-level adjustment. And finally, it is impossible not to mention the convenience resulting from the remote control with a built-in gyroscope, which allows it to function like a mouse. The WebOS system, which we will navigate, is incredibly smooth and responsive. It offers a multitude of applications that will be more than sufficient for the vast majority of users. The heart of the LG B4 TV is the advanced Alpha processor, which is responsible for image smoothness and advanced signal analysis. In summary: who is the LG OLED B4 for? It is the perfect device for those expecting the highest possible image quality within a given budget, but not only that. The LG B4 clearly stands out from the competition at its price point, which cannot offer such high-quality image in this price range.

LG QNED91T is the only MiniLED-backlit TV from LG for 2024 that catches the eye with its innovative use of a VA panel. This is certainly a departure from the established standards of the Korean manufacturer with its top-tier LCD TVs, which typically used an IPS/ADS panel. But the result is positive – the panel combined with local dimming offers really good contrast. Blacks are deep and should satisfy most users. LG 65QNED91T6A is a very bright TV, so placing it in slightly challenging lighting conditions will not pose a challenge for it. In terms of motion fluidity, the QNED91T shows top class. The TruMotion feature works great, allowing for image adjustment according to personal preferences – from a classic, cinematic look to a more fluid effect. And the 120Hz panel makes it ideal for sports or gaming. For the latter, LG has prepared something special – four full HDMI 2.1 ports with a bandwidth of 48 Gbps, allowing for features like VRR and ALLM (and more). This, combined with low input lag, makes this equipment an excellent choice for gaming on a console or PC. Daily use of QNED91T is pure pleasure, mainly thanks to the WebOS system. The interface is intuitive, there's no lack of applications, and the Magic Remote included in the package significantly simplifies navigation through the menu. Operation is fast, and using the TV is comfortable thanks to the voice assistant. Unfortunately, the TV also has its weaknesses. Despite the advantages of the VA panel in terms of high contrast, the algorithms responsible for local dimming of the miniLED zones do not perform very well. In HDR content, there are situations where the picture is either too bright or excessively dark, which is particularly problematic in scenes requiring precision. Additionally - in practice, the differences between standard HDR10 and Dolby Vision are nearly invisible. This is a significant disappointment, especially in this class of TV. Nonetheless, the LG QNED91T is an interesting choice for those who need a TV with high brightness, considerable gaming capabilities, and appreciate the convenience of the WebOS system. If the priority is picture quality in HDR content, such as Netflix, Prime Video, or Max, we recommend considering alternative models, such as OLED B4 from the 2024 line, which is available for a similar price.

LG B4 uses OLED panels produced by LG Displays. The use of this type of panel gives us perfect contrast and black levels. Thanks to these conditions, the image is incredibly three-dimensional, almost as if it were three-dimensional. The manufacturer's series with the letter "B" has always been the ideal solution for those seeking very good image quality while not wanting to pay extra for features that are only available in higher series. Therefore, these models have been somewhat of a dark horse in this price range, as their competitive pricing primarily allowed them to compete with Mini LED televisions. It’s not hard to say that these models have won these battles due to the absence of characteristic flaws found in LCD receivers with multi-zone backlighting, such as blooming/halo effects or dimming of images with fine bright details. And as we can see in the test scenes from the films "Oblivion" and "Sicario 2," the image quality stands at the highest level. Looking at the first one, we see a spectacular play of lights that, despite their brightness, are perfectly separated from each other. Even the more difficult scene with the helicopter poses no problem for LG B4, showcasing a wealth of detail and the specific colour grading characteristic of this title.

QNED91T is a television with MiniLED backlighting, and in the tested size of 65", we counted 160 local dimming zones. The unit we tested, with a "1" at the end, is equipped with a VA panel, which offers significantly better contrast than IPS panels, which - note - can be found in the model LG QNED90T. Therefore, it's wise to be cautious when choosing a version to avoid disappointment regarding contrast. The model QNED90T is rather hard to acquire in Poland, but distribution can vary. Returning to our contrast tests, it performed really well in less demanding scenes. For example, in one of the scenes from the movie "Oblivion," we observed perfect separation of lights - it looked impressive. However, not everything is so straightforward. In a scene from "Sicario 2," we noticed that the screen was noticeably darker, deviating significantly from the reference image appearance. The television effectively eliminates the halo effect (i.e., the glow around objects), but this comes at the cost of brightness - and quite a considerable one at that. Despite these compromises, the contrast of LG 65QNED91T6A is genuinely solid. Of course, as is the case with MiniLED televisions, some limitations must be taken into account, but the overall impression is very positive.

The brightness results in HDR materials LG B4 are very good. It is true that none of them exceed 1000 nits, although the luminance stability is excellent and looks practically the same in every scenario. The only moment where the tested television performs worse is the last scene, although this should not come as a surprise. Large frames filled with a lot of white have always been, and will likely continue to be, somewhat of a weakness for OLED televisions. However, the combination of perfect contrast, black levels, and brightness in the LG B4 allows for a full spectrum of the HDR effect. Additionally, the incredibly high coverage of the DCI-P3 colour gamut, which reached 99%, deserves recognition. As a result, colours look incredibly vibrant and stunning.

As befits a MiniLED television, LG QNED91T easily exceeds the magical barrier of 1000 nits on the luminance chart. In scenes where light played a key role, the effect was truly commendable. For instance, 1000 nits in the first scene of "Life of Pi" is a really impressive value, and the achieved 600 nits in the third and fifth scenes allowed for a true sense of HDR magic. However, problems arise with very small light elements on the screen, such as the moon, street lamps, or lights. Values around 100 nits - to put it bluntly - are disappointing, as these elements are so dark they are barely visible. The television deserves praise for covering 96% of the DCI-P3 colour gamut and 75% of BT.2020. LG QNED91T leaves us with very mixed feelings, mainly due to the very aggressive dimming algorithms which, while effectively eliminating halo effect, do impact the brightness of smaller elements.

The best factory mode prepared by the manufacturer is "Filmmaker," and we used it throughout the entire testing procedure. We must admit that the unit we received straight out of the box had quite decent colour reproduction. The biggest issue in both SDR and HDR content turned out to be white balance. In the former, there was a strong dominance of red, resulting in a noticeable yellow tint in the displayed image, particularly evident on skin tones and whites. In high-quality materials, this colour was also pronounced, but due to a lack of blue, there were also signs of green visible. Besides these shortcomings, we also encountered issues with greyscale and the colours themselves.

All our tests are conducted in the best picture mode on each television. In this case, as usual, it’s the Filmmaker mode. The name of the mode suggests ideal colour reproduction; however, there were noticeable deviations from the correct image. Our unit, in terms of white balance, exhibited a significant drop in blue hues - both in SDR and 4K HDR materials - resulting in a noticeable yellowing of the image, evident in the comparison scenes from a movie with Tom Cruise. As we described earlier, QNED91T has a tendency to brighten the screen. This is confirmed by the gamma, which is quite significantly lower than the reference value of 2.4. Meanwhile, the EOTF curve, which is responsible for brightness in 4K content, showed some issues with the television’s ability to dim the image in the darkest areas, which we could observe in the paragraph describing the quality of the HDR effect. Although the Filmmaker mode is a pretty good "out of the box" mode, it still requires some adjustments.

LG B4 has been providing very advanced calibration tools in its TVs for years. We can even say that as the only manufacturer on the market, it allows for such deep intervention in image adjustment. Thanks to these, we were able to calibrate the device so well. The evidence of this is the extremely low deltaE errors, which can be said to stand at a reference level. Both SDR and HDR materials now look exactly as the film director intended. It is no coincidence that TVs of this brand are most often used as preview screens for various graphic or post-production studios.

LG offers advanced calibration tools in its televisions such as 65QNED91T6A, which we took advantage of. When it comes to white balance, we managed to significantly correct it in SDR content. The picture mode in 4K HDR quality posed greater challenges, which, while still not perfect, looks significantly better than before calibration. The errors on the Color Checker palette and the colour palette are much smaller than in the factory settings. In terms of brightness characteristics, gamma for HD content is practically perfect, with a small exception at the end of the graph. However, the biggest issues the television faced were with brightness in 4K HDR content. Analyzing the EOTF characteristics in films, we noticed that the television manipulates brightness quite a bit, which we could observe in previous tests. Brightness is significantly boosted compared to the graph in the static test, and the television brightens certain scenes to the extent that some smaller details lose definition. Unfortunately, this is caused by an average backlight zone management algorithm in this model. Nevertheless, the calibration yields quite good results, especially regarding accurate colour reproduction.

The smoothness of tonal transitions, often overlooked in various tests on competitive portals, is an equally important aspect of image quality assessment. It is particularly crucial when watching materials that feature a wealth of colours and many intricate effects, where textures blend together. This often leads to what's known as colour banding, or a lack of smooth gradation. The tested television handles tonal transition smoothing quite well. However, it's worth noting that it has its weaker moments, such as the bright colourful sky in the film "Kingsman" or "The Martian." These, however, are not issues that detract from the viewing pleasure. Therefore, we assess the quality of tonal transitions in LG B4 positively.

The gradation on LG QNED91T looks very good. There are only slight cutoffs in the brightest scenes, but the television handles blacks very well, providing smooth tonal transitions. As a result, the image is natural and pleasant to the eye, with no visible issues.

In this paragraph, we will take another look at the tonal transition smoothing feature, but we will also check how the TV handles lower quality material. As we have managed to check, the setting responsible for smooth gradation works quite effectively, although it has its weaker moments. While the feature works well with SDR content, it becomes less useful with HDR content. Even at the lowest of options, it blurs essential details, so we advise against using it.

The image scaling on LG B4 is rated fairly moderately positively. Although there is no edge splitting, the image itself is naturally "soft". We can change this by adjusting the sharpness slider.

When it comes to tonal transitions in lower quality materials, the television offers a well-known feature from LG TVs - "Smooth Gradation". We can control it at three levels: low, medium, and high. We recommend using the medium option, as it handles tonal transitions well without causing noticeable issues with removing the structure of objects or other artifacts.

On the other hand, when it comes to image scaling (upscaling), LG's Alpha processor performs quite well here. The image appears very smooth, with slight jaggedness in some elements, but this does not significantly affect quality. It looks really good, and the overall effect is very satisfying.

The maximum refresh rate we can set on the LG B4 is 120 Hz. This is the absolute minimum for those who require high image smoothness. The manufacturer has implemented a multi-level motion smoother called "TruMotion". It has been divided into two separate sliders that adjust the sharpness of moving images (De-Blur) and stuttering (De-Judder). Both sliders can be set in the range from 0 to 10, with each level affecting the degree of smoothness, so everyone can find their sweet spot.

The LG OLED B4 panel features an average response time of 0.1 ms (which directly results from our measurements), allowing for an incredibly clear image, unattainable for LCD TVs, which have response times of even several milliseconds. This can be clearly seen in images from the "UFO Test", showing no trace of blur trailing behind the object.

The television has a refresh rate of 120 Hz, which should satisfy most users in terms of motion smoothness. Additionally, QNED91T is equipped with TruMotion technology, which allows for smoother image display in films. With this feature, we can adjust the "De-Judder" and "De-Blur" sliders. The "De-Judder" slider reduces stutter in films, which is particularly useful when playing content with a lower frame rate, while "De-Blur" helps to reduce motion blur in fast scenes, which is important for sports or dynamic shots.

The LG B4 television is equipped with four full-fledged HDMI 2.1 ports with a full bandwidth of 48Gbps. All functions corresponding to this standard activated without any issues, and throughout the entire testing procedure, they caused no problems. The combination of such extensive functionality and low input lags leads us to say that the tested television is truly designed for gaming. This is not surprising, considering that the manufacturer has always placed great emphasis on this. Therefore, we can enjoy both a properly implemented HGIG mode and gameplay in Dolby Vision with low latency. Such a tandem will surely attract the attention of all passionate gamers for whom quality is the most important.

A standard feature in televisions from the Korean manufacturer is also the implementation of GameBar, allowing for quick adjustments of settings "on the fly," without the need to exit the game. It also enables image adjustments for individuals with visual impairments, which is an extremely nice touch. Another important piece of information is that when the VRR technology is turned on, we will not experience a drop in contrast. This is, of course, due to the construction of the panel and the lack of conventional backlighting. However, it is normal for shades of grey to flicker slightly, although this is a characteristic feature of this function regardless of the manufacturer and the television.

In summary: The LG B4, like all OLEDs from the manufacturer equipped with 120Hz panels and HDMI 2.1 ports, creates a harmonious whole with the console. In practice, it is a complete television, and if we expect the highest possible efficiency in gaming, the B4 will be the ideal choice.

The LG 65QNED91T6A television is equipped with HDMI 2.1 ports with a full bandwidth of 48 Gb/s, providing full support for all the standards needed for gaming on modern consoles. We can count on variable refresh rate (VRR) support and automatic low latency mode (ALLM). This ensures smooth gameplay without delays.

Thanks to support for all popular HDR standards in gaming, such as HGiG and Dolby Vision, we can fully utilise the potential of the PS5 and XBOX One consoles. The television also easily handles lower resolutions than 4K, so even older consoles look good on it. The Game Bar makes it easier to access gaming-related settings, allowing us to quickly and intuitively adjust picture parameters and features for gamers. Additionally, the QNED91T offers NVIDIA GeForce Now functionality, allowing us to play in the cloud without needing a console. However, it's important to keep in mind that this solution is quite costly and somewhat falls behind the Xbox Game Pass, which is available only on Samsung televisions.

QNED91T LG is a great choice for both less experienced and more advanced gamers looking for a versatile television for gaming.

Delay times for LG B4 are incredibly low in every scenario. Even the most passionate gamers will certainly appreciate the very low input lag of just 5 ms at demanding settings of 4K 120 Hz with HDR. It's also worth noting that the latency at the same settings, but with Dolby Vision HDR enabled, remains unchanged, which is not as obvious with the competition. Therefore, it deserves the highest rating and recommendation.

Input lag on QNED91T is really very low, even in Dolby Vision mode. This means we can expect a quick response time, which is very important in fast-paced games, where every millisecond counts. Regardless of whether we are playing in standard mode or HDR, the television offers very good results that will satisfy even the most demanding gamers.

LG B4 paired with a PC performs excellently due to its very low latency of just 13.5 ms, which is virtually instant response between the mouse, the eye, and the screen. A crucial aspect of working on a display is readability, which in the case of the tested television is very good. However, it's worth noting that to achieve sharp fonts, you need to enable the passthrough option in the settings.

The RWBG pixel layout does not significantly affect the display of fonts or letters, which is a notable advantage over Samsung's QD-OLED matrices. Users of both Windows and macOS equipped computers will certainly be pleased with the performance on the tested television screen.

When it comes to gaming on a computer, LG QNED91T synchronises effortlessly with NVIDIA graphics cards and supports G-Sync functionality. The very low input lag makes gaming with a personal computer a real joy. The TV supports chroma 4:4:4, which provides excellent text readability. While we did notice slight blurring of fonts around the edges, overall the image looks very good, and readability is at an acceptable level.

The undeniable advantage of OLED panels is their efficiency in group viewing, meaning from different angles. LG B4 maintains very good contrast, colour saturation, and fidelity. While it may not match organic TVs supported by MLA technology, it cannot be said that anyone who purchases the device has been dissatisfied with the results. However, it should be noted that at sharp angles, a slight greenish tint can be observed. This is a characteristic feature of WRGB panels from LG, without the aforementioned micro-lens technology, and unfortunately, there is nothing that can be done about it.

As we mentioned in the paragraph about contrast, the television is equipped with a VA panel, which generally offers very good contrast compared to IPS panels. Unfortunately, VA panels have their weakness in the form of limited viewing angles, which is also evident in the case of QNED91T LG. The viewing angles here are not the best, and while the use of an angle-enhancing coating could significantly improve the situation, unfortunately, we don’t have that here. As a result, the picture loses quality when viewed from a greater angle, which can be problematic when more people are watching at the same time.

The maximum brightness of the TV in SDR materials is 370 nits. For an OLED TV, this is a very good result, allowing for quite comfortable viewing during the day. There are two things worth noting. The first is the rather average handling of reflections caused by the satin finish of the panel, which means that direct light hitting the TV can be quite intrusive. The second issue is the screen brightness at 100% white fill, hovering around 260 nits, which is an outstanding result, as until recently, OLED TVs in this range could "boast" a brightness two times lower. This means that conditions for watching, for example, winter sports, will be very good.

The TV LG 65QNED91T6A is equipped with a satin panel, which handles direct light reflections, such as from lamps or wall sconces, moderately well. In the first test photo with a large lamp, you can see how the reflection "spills across the screen." However, the QNED91T makes up for it in terms of brightness - an average SDR brightness of 580 cd/m² is sufficient for watching television even in more challenging lighting conditions. Because of this, despite issues with reflections, the TV performs well during the day.

LG B4 uses the well-known proprietary WebOS system that has been around for many years. The system itself offers virtually all the most important applications, and those that are missing can be counted on one hand, such as CDA or KODI.

WebOS also features a highly valued ability to perform operations using a cursor that appears when the remote is in motion. The convenience of such a function is invaluable when entering queries or passwords for portals. WebOS, like most systems, also supports features such as screen mirroring, AirPlay, voice search in Polish, and the ability to connect headphones via Bluetooth. More down-to-earth things, WebOS allows us to use headphones and the TV's speakers simultaneously, which will surely be a great assistance for people with hearing disabilities. Among the more interesting features that will primarily appeal to sports fans, there is the option to turn on an alert informing about an upcoming match, ensuring that we never miss a broadcast. The home panel also deserves praise, allowing control of all smart devices connected to the home network. For example, the end of a washing cycle will be signalled by a notification in the top right corner.

In summary, the WebOS system, although less known and having certain limitations compared to Android TV, offers stable and fast operation and supports most features that users might need. It is a solid solution for those looking for a simple and effective operating system in a television.

The most important thing in today's televisions, apart from picture quality, is the operating system. The one available in LG models is really very good. Of course, we're talking about the WebOS system, which offers most of the popular apps available in Poland, much like GoogleTV. What sets this system apart is primarily the excellent remote control with an accelerometer - the Magic Remote, which resembles a magic wand. Controlling with this remote is incredibly convenient. Additionally, the television offers a very good voice assistant that understands Polish perfectly.

In terms of user features, the television offers practically everything one could wish for. Here we find the ability to record programs from built-in tuners, support for AirPlay to connect an iPhone, and a mirroring function. We can easily connect keyboards, mice, or headphones, although keyboards are not essential thanks to the handy Magic Remote. Unfortunately, the PiP (Picture-in-Picture) feature is missing here, but it's such a specific function that only those who really need it will feel its absence. The QNED91T is a television that does not disappoint when it comes to daily enjoyment of its use.

The default file player in LG B4 definitely handles most photos quite well, although it's surprising that some equally popular ones are missing. We can successfully play videos recorded in practically all the most popular formats, including Dolby Vision. The only codec that LG B4 won’t play is H.266 VVC, although this is currently rather unused. However, it’s worth noting the supported photo formats, which are just two: JPEG and PNG. Apple phone users may feel disappointed by the lack of support for the HEIC format, which is the default format when taking photos. The remedy for this is to use the built-in AirPlay feature. We should also mention the lack of TXT subtitle support.

The built-in player in QNED91T should satisfy most users. It handles Polish characters without issue and plays movies with subtitles from external drives. The player also manages most audio formats and photos, except for Apple HEIC files.

The audio system built into the LG OLED B4 can be considered quite decent. We can say that it holds up fairly well in its price range. The bass is quite noticeable, but it doesn't overpower the other frequencies. It can be said that the sound is reasonably well balanced. We believe that those opting for this class of display are, or will be, in possession of an appropriate audio system. Therefore, the presence of DTS-HD Master Audio and Dolby Atmos codecs is not insignificant.

LG QNED91T comes with a set of 4 speakers in a 2.2 configuration with a total power of 40W. The TV sounds quite pleasant, and the subtle bass is noticeable. Of course, it's not on the level of an external audio system, such as a soundbar or home theatre, but it's sufficient for everyday use. It's also worth praising the support for audio formats DTS:X and Dolby Atmos, which significantly enhance the audio experience.

LG 55 B4 vs LG QNED91T6A

Advantages

Disadvantages

Our verdict

TV appearance

Where to buy

Contrast and black detail

HDR effect quality

Factory color reproduction

Color reproduction after calibration

Smoothness of tonal transitions

Image scaling and smoothness of tonal transitions

Blur and motion smoothness

Console compatibility and gaming features

Input lag

Compatibility with PC

Viewing angles

TV efficiency during daytime

Details about the matrix

TV features

Playing files from USB

Apps

Sound