LG 55 B4 vs Samsung QN80H

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.

The Samsung QN80H is undoubtedly a bright TV. In synthetic tests it exceeds the 1000‑nit mark, which on paper already promises a solid HDR effect. In practice the screen really shows its stuff, although it can't always fully spread its wings (or its backlight 🤔). The best impression comes from bright, wide shots. Sunlit landscapes or heavily lit scenes look really good on it. Brightness then sits around 700 nits, which delivers a noticeable step up compared with standard SDR. Problems start in dark scenes with small, pinpoint highlights. The QN80H tends to dim those aggressively to protect black depth at all costs. On one hand you get better contrast, on the other... you lose dynamics and the sparkle of fine HDR detail. The TV therefore has plenty of potential, but the local‑dimming algorithm can be too restrictive.

Colour‑gamut coverage

Colour-wise it’s also good. The QN80H uses quantum‑dot technology, and in our measurements it covered 93% of the DCI‑P3 colour space and about 70% of BT.2020. Those results won't drop anyone's jaw today, but in real‑world use they’re more than enough to deliver a vivid and natural picture for most films and series. Colours are suitably saturated and, after proper tuning, they don't look artificial or overly aggressive.

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.

The QN80H’s factory settings performed really well, especially compared with most TVs that come through our tests. Of course we took measurements in Filmmaker Mode, and that’s the mode we recommend switching on right after the initial setup. For SDR content our sample was set up surprisingly well. The white balance was very even, colours looked natural, and errors were so small they were hard to spot without test equipment. The only weaker point was the gamma. In brighter parts of the picture the TV brightened them a little too much, so the image sometimes lost some depth. Even so, we wish most TVs looked this good straight out of the box.

It was a bit worse in HDR. The white balance was still set correctly, so the issue wasn’t colour but the way the QN80H managed image brightness. You could see that straight away on the EOTF chart. The TV brightened large parts of scenes too much, causing the brightest elements to blow out. Interestingly, very small highlights were often dimmed too much at the same time. As a result some fine details simply disappeared. The factory Filmmaker mode in HDR isn’t bad, but it’s definitely not as well tuned as it is in SDR.

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.

The biggest difference after calibration was in HDR Filmmaker mode. SDR was already very good out of the box, so we didn't have much work to do there. In HDR, however, we were able to rein in how the QN80H handled brightness; it had been making most scenes too bright. After calibration the picture is calmer, more natural and much closer to a faithful reproduction.

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.

The digital image processing in the Samsung QN80H is handled by the second-generation NQ4 AI processor. It's a chip we've already seen in previous Samsung models and it still performs very well, especially with lower-resolution content. The image is effectively upscaled to 4K, but without excessive sharpening and without making it feel like the TV is trying to forcibly enhance the source material.

The "Noise Reduction" feature also proves useful. It can noticeably reduce posterisation and visible banding in lower-quality material, especially in low-bitrate streaming. However, you should remember it doesn't work without side effects. It can remove some film grain and slightly smooth the picture. So with a good-quality source we'd leave this feature turned off. If, however, banding and uneven tonal transitions bother you more than the loss of some grain, "Noise Reduction" can be a really useful addition.

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.

Motion blur and motion handling on the QN80H are really good, mainly thanks to the fast panel. In 4K the screen refreshes the image at up to 144 Hz, and when switched to Full HD and connected to a PC it can reach up to 240 Hz. That's new for Samsung TVs and a handy extra for people who want to use the TV for PC gaming. We were more interested, though, in how the QN80H performs at 120 Hz, because consoles use that refresh rate. It does very well. The panel doesn't suffer much from the smearing typical of VA panels; faint trails behind moving objects are mostly visible on dark backgrounds. That's not something that would interfere with normal sports watching or gaming. The TV also has a motion smoothing system that Samsung calls "Picture Clarity". You can set judder reduction and blur reduction separately, so it's easy to tune it for films, sport or your own preferences.

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 Samsung QN80H is a TV that performs very strongly when it comes to gamer-focused features. The biggest new feature for 2026 is DLG mode, which allows refresh rates up to 240 Hz when the image is switched to Full HD. It's an option aimed mainly at PC users, but it also shows that Samsung is still investing heavily in the gaming side of its TVs. The list of advantages doesn't end there. The QN80H has four full HDMI 2.1 ports, which at this price point still isn't standard. So you can connect multiple consoles, a PC or a soundbar at once and not worry about which port supports the full video capabilities. The TV also supports VRR, ALLM and HGiG, so it's hard to fault its basic feature set.

A downside is the lack of Dolby Vision, which could matter especially for Xbox Series X owners. However, this isn't a flaw that rules the QN80H out as a gaming TV. Samsung does have a feature that most manufacturers still lack, namely its proprietary motion smoothing, Game Motion Plus. This motion smoother also works in game mode, improving the smoothness of titles running at 30 or 60 frames per second without a drastic increase in input lag. In practice, Game Motion Plus can make a much bigger difference than Dolby's codec, especially in more demanding games that don't offer a 60 fps mode. The image becomes noticeably smoother, while controls remain sufficiently responsive. So despite the lack of Dolby Vision, the QN80H is still one of the best-equipped gaming TVs in its class.