LG 55 B4 vs Sony BRAVIA 7 II

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.

Sony Bravia 7 II handles HDR very well and, above all, is simply a bright television. In the correct viewing mode for watching, Professional, we measured about 2,000 nits of peak brightness, so the panel’s capabilities are truly large. Of course, in Mini-LED sets a test-pattern result is only part of the story, because much still depends on how the TV controls the backlight in real scenes. Here Sony’s algorithms perform really well. Depending on the scene, the brightness we measured in films ranged from about 1,100 to as much as 1,700 nits. That’s a level at which HDR has proper punch and bright highlights can be genuinely impressive. It’s not perfect in every situation. With small bright elements on a very dark background, the Bravia 7 II clearly prioritises maintaining good black levels, so their brightness can fall to around 500 nits. It still looks good, but it’s clear the TV doesn’t always manage this without compromise.

Colours

The second thing that has a huge impact on HDR is, of course, colour. And this is where True RGB was meant to deliver one of the biggest changes. Looking at the panel’s capabilities alone, the Bravia 7 II performs very well. We measured roughly 98% DCI-P3 coverage and 88% BT.2020, so the potential for showing highly saturated colours is substantial. In RGB TVs the matter is a bit more complex. When we repeated the same measurements with a film-like background applied, gamut coverage dropped to about 92% DCI-P3 and 78% BT.2020. Those are still good numbers, especially for an RGB Mini-LED TV, but they show that the final result largely depends on how the algorithms drive the three backlight colours. In most scenes the Bravia 7 II handles this well and colours retain strong saturation. The biggest differences are visible in blue shades, where samples start to deviate more noticeably from the reference values and coverage is weaker than for the other primaries. True RGB therefore offers genuinely greater potential, but, as with brightness, a lot depends on what’s actually happening on screen.

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.

To evaluate the factory colours we chose the Professional mode, because it performs best among the available presets. It's not perfect. In SDR the white balance is slightly biased toward magenta, so some scenes look a little warmer and less neutral than they should. A bigger issue is the gamma, which sits closer to 2.5 than 2.4. As a result the image is a bit too dark in places, especially in the mid-tones. In HDR the situation is better. As brightness increases there's a little too much red, but it isn't something that really jumps out while watching. Overall the Professional mode is a good starting point, though you can get a bit more out of it with calibration.

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.

After calibration the Bravia 7 II can look significantly better. First and foremost, we managed to set the white balance very well in both SDR and HDR. Gamma can also be improved, and after correction it runs very close to the reference value. For most users those changes will have the biggest impact on the picture. There is, however, a limitation with the colours themselves. On the Bravia 7 II Sony does not provide access to a traditional CMS that would let us adjust individual hues separately. Much is left to the algorithms controlling the True RGB backlight. If the TV reproduces a specific colour inaccurately, we are not always able to do anything about it. In our measurements this is most apparent in parts of the reds and blues, where errors can still be quite large. That does not, however, undermine the value of calibration. Correctly setting the white point and gamma strongly affects the whole picture, so even without the ability to precisely correct every colour the difference from the factory settings is noticeable.

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.

Scaling and digital processing are among the strongest points of the Bravia 7 II and one of Sony's biggest advantages over the competition. Sony has for years excelled at digital image processing, and it's clear here too. Above all, the 'Smooth Gradation' function works very well, smoothing weaker tonal transitions in poorer-quality content. The safest setting is low, but we'd comfortably recommend medium as well. The effect is stronger, and the TV still handles fine detail very delicately. Some minor details may be slightly smoothed, but Sony does it much more subtly than many other brands. Upscaling is also very good. Lower-resolution content is nicely upscaled to 4K; the image looks clean and retains a lot of detail. Of course the TV won't magically turn native HD into true 4K, but the Bravia 7 II does very well with what can be pulled from such a source.

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 Bravia 7 II uses a 120 Hz panel, so in terms of motion handling it delivers everything you'd expect from a TV of this class. With sport or games at 120 fps the picture is suitably smooth, and for films Sony provides an advanced motion interpolation system. You can therefore adjust the level of interpolation separately and choose whether to retain a more cinematic motion or achieve noticeably greater smoothness. Motion blur itself is a bit worse. The VA panel used isn't among the fastest, and moving objects can show a slight trailing, especially against darker backgrounds. It's not at a level that will seriously disturb normal viewing, but last year's Bravia 7 was better in this regard and had a noticeably faster panel.

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 7 II has pretty much everything you'd want from a good console TV today. It supports 4K at 120 Hz, VRR from 48 to 120 Hz and ALLM, so when you start a game the TV automatically switches to low-latency mode. HGiG works correctly, so once you configure HDR on the console the TV won't try to brighten the image on its own. Just remember to turn off tone mapping in the TV's menu. Another plus is Dolby Vision in game mode, which will be especially useful for Xbox owners. Sony also includes its own Game Menu, where you can quickly view key signal info, check VRR or change gaming settings without digging through the full TV menu. The only thing missing from the feature list is support for 1440p at 120 Hz. Our biggest complaint is not really about the features but the connectors. The Bravia 7 II has four HDMI ports, but only two of them support full HDMI 2.1 with 48 Gbps bandwidth. One of those is also the eARC port. So if you connect a soundbar or AV receiver via HDMI, in practice you only have one full HDMI 2.1 left for a console or PC. With a single console that's fine, but with a PS5, an Xbox and an audio setup it starts to feel cramped. That's hard to justify from Sony. In cheaper TVs two HDMI 2.1 ports can still be accepted, but in a model of this class, especially in 2026, we'd expect all four ports to be HDMI 2.1.