LG 55 B4 vs SONY BRAVIA 3

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.

Bravia 3 does not hide the fact that it belongs to a group of TVs that are rather modest in terms of brightness. Our measurements showed around 370 nits, which is a value balancing on the brink where any HDR effect can still be discussed. For some, this is an acceptable level, while for others it is more typical for SDR materials, where spectacular flashes or vivid contrasts are not expected. The impression is that this is not a TV for those focused on the highest image quality in demanding film content. However, this does not mean that there are no advantages to be found here. Compared to its predecessor, the X75WL, the Bravia 3 has gained an additional PFS filter, which works similarly to solutions known from QLED technology. Thanks to this, the DCI-P3 color gamut has been significantly expanded, reaching over 91 percent, which in practice results in more saturated colours and a more pleasing texture of the image. As a result, even everyday content looks a bit more vibrant, and films and series can surprise with their colourful presentation, despite limitations in brightness itself.

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.

We primarily tested the Sony Bravia 3 in movie mode, which immediately turned out to be the best choice among the factory settings. It's not a perfect picture, but compared to the eco mode that the TV suggests straight out of the box, the difference is evident and definitely better. In movie mode, there is a noticeable issue: the picture seems too warm, which is due to the lack of blue colour in the white balance. Nevertheless, in SDR content, the final effect can still be considered quite decent and satisfactory for everyday viewing. Much more serious errors arise in HDR materials. The Color Checker analysis showed significant deviations, and poor brightness management, combined with limited colour gamut coverage, further exposes the shortcomings of the picture in this mode. All of this makes HDR on the Bravia 3 look unconvincing and can ruin the impression left by the otherwise quite decent SDR content settings. Fortunately, it’s not a hopeless situation. Various errors can be somewhat mitigated, and some can even be completely corrected through professional calibration. That's why we decided to check how the TV would perform after such 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.

Calibration allowed us to extract significantly more from ChooseTV 3 than we could have expected at the beginning. First and foremost, it managed to address the deficiency of blue, which previously caused a noticeable warming of the image. After a slight adjustment in white balance, most errors in the Color Checker measurements for SDR content practically disappeared. The whites took on a natural tone, and brightness management in gamma stabilised to an almost ideal level, not exceeding the threshold of what the human eye can perceive. So it is safe to say that in SDR content, after a few adjustments in the settings, ChooseTV 3 performs really well. It fares much worse, although still definitely better than before calibration, when it comes to HDR content. The white balance has been brought in line, but the limitations of the IPS panel are insurmountable. The lack of local dimming means that even the smallest elements can be overexposed, which is immediately noticeable. Colour-wise, the effect has also improved, although it is far from perfect – many errors still exceed the threshold of four, and even five delta E units, remaining visible to the human eye. It was already clear earlier that ChooseTV 3 is not a television designed to impress with HDR quality. Nevertheless, it is pleasing that in SDR content, after calibration, the picture can look really great and in this category, the television pleasantly surprised us.

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.

Bravia 3 brings something more to the Sony television family than just a shared name. It stands out primarily for its ability to enhance the quality of weaker materials thanks to the processor used. Of course, we won’t find the advanced XR chip known from more expensive models here, but nonetheless, it must be said that the image in lower resolution looked surprisingly good. The scaling worked effectively, and most areas of the screen were free from the typical excessive edge roughness found in budget constructions.

Also worthy of attention is the function that improves the smoothness of tonal transitions. In high setting, it works really well, effectively masking gradation imperfections without significant loss of detail. It does happen that the algorithm overzealously smooths elements that should remain sharp – for example, faces – however, in the overall assessment, the effect is beneficial. The best results were achieved precisely at the highest setting, and this is the option we could recommend to those watching lower-quality content.

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 smoothness has never been a strong point of televisions equipped with 60 Hz panels, and the Bravia 3 is no exception. Nevertheless, Sony has included something that may appeal to those more sensitive to the way images are displayed. I'm talking about the proprietary motion smoother, Motion Flow, which gives the user plenty of adjustment options. With it, one can make the image smoother, almost theatrical, or stick to a more cinematic style with characteristic judder that many people simply associate with a filmic atmosphere. These functions work with content at lower frame rates, such as films and series recorded at 24 or 30 frames per second, which is the material we deal with on a daily basis. This is precisely where the motion smoother proves to be one of the most important features in everyday TV usage, and here, the Bravia 3 performs really decently.

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.

Bravia 3 is not gear for e-sports enthusiasts or fans of late-night marathons with a controller in hand. The lack of 120 Hz refresh rate and HDMI 2.1 ports shuts down the conversation before it even gets started. This is a TV for casual gamers who, after work, will fire up FIFA or racing games, not for someone who measures every frame in a spreadsheet. Nonetheless, Sony has thrown in a few nice additions so it’s not completely sparse. ALLM works as it should, automatically switching the TV to game mode (low latency). We even find a simple Game Bar here, which is clear and intuitive. However, the biggest curiosity here is the PlayStation Portal app. Thanks to this, you can launch PS5 games wirelessly and see them right on the TV screen. It sounds great, but it only takes a few minutes to feel significant lag. In our opinion, it's more of a showcase of capabilities than something that can be used day-to-day. If someone really wants to game, it's better to plug the console in with an HDMI cable and forget about wireless issues.