LG 55 B4 vs Sony BRAVIA 7 II

The HDR brightness performance of the LG B4 is impressive, even though it doesn't surpass 1000 nits. Its luminance stability is consistently strong across various scenarios, delivering a reliable viewing experience. The only instance where the TV shows slight weakness is in scenes with large areas of bright white, which has long been a challenge for OLED technology. However, perfect contrast, deep blacks, and excellent brightness ensure a fully immersive HDR experience. Furthermore, the TV’s remarkable 99% coverage of the DCI-P3 colour gamut enhances its colour vibrancy, making images appear rich and visually striking. This level of colour accuracy and brightness balance firmly places the LG B4 among the top choices for HDR content.

The Sony Bravia 7 II handles HDR very well and, above all, is simply a bright TV. In the proper "Professional" viewing mode we measured about 2000 nits of peak brightness, so the panel's capabilities are really substantial. Of course, with Mini-LEDs the result on a test pattern is only part of the story, because a lot depends on how the TV controls the backlight in real scenes. And here Sony's algorithms perform really well. Depending on the scene, the brightness we measured in movies ranged from around 1100 up to 1700 nits. That's already a level at which HDR has the proper punch and bright effects can really impress. It's not perfect in every situation, though. With small bright elements on a very dark background the Bravia 7 II clearly prioritizes maintaining good black levels, which can cause their brightness to drop to around 500 nits. It still looks good, but you can see the TV doesn't always operate without compromises.

Colors

The second thing that has a huge impact on the HDR effect is, of course, color. And this is where True RGB technology was supposed to bring one of the biggest changes. Looking at the panel's raw capabilities, the Bravia 7 II performs very well. We measured about 98% DCI‑P3 coverage and 88% BT.2020, so the potential to display highly saturated colors is really large. However, in RGB TVs the situation is a bit more complex. When we performed the same measurements with a movie background applied, the gamut coverage dropped to about 92% DCI‑P3 and 78% BT.2020. Those are still good figures, especially for an RGB Mini-LED TV, but they clearly show that the final result largely depends on how the algorithms control the three backlight colors. In most scenes the Bravia 7 II handles this well and colors retain high saturation. The biggest differences are seen in shades of blue, where samples start to deviate more noticeably from the reference values and coverage is weaker than for the other primary colors. So True RGB does offer real additional possibilities here, but like with brightness, much depends on what is actually happening on the screen.

The best factory preset offered by LG B4 is the "Filmmaker" mode, which we used throughout our testing. Straight out of the box, the TV delivered fairly accurate colour reproduction. However, the most significant issue in both SDR and HDR content was the white balance. In SDR, there was a noticeable red dominance, giving the image a distinct yellow tint, particularly evident in skin tones and whites. In HDR, this red hue persisted, but the lack of blue also introduced a greenish tint in certain scenes. Additionally, we observed some inconsistencies in grayscale and colour accuracy. Despite these shortcomings, the overall picture quality was still solid for most viewing scenarios.

To evaluate the out-of-the-box colors we chose Professional mode, because it performs best among the available settings. It's not perfect, though. In SDR the white balance leans slightly toward magenta, so some scenes look a bit warmer and less neutral than they should. A bigger issue is the gamma, which sits closer to 2.5 than 2.4. That makes the image a bit too dark in places, especially in the midtones. In HDR the situation is better. As brightness increases there is a bit too much red, but it's not a fault that stands out during viewing. Overall, Professional mode is a good starting point, although you can get a little more out of it with calibration.

LG B4 has long been known for offering advanced calibration tools, and it remains one of the few manufacturers that allows such in-depth image adjustments. Thanks to these tools, we calibrated the device to an exceptional standard. The result was incredibly low deltaE errors, considered at a reference level. Both SDR and HDR content now display exactly as the filmmaker intended. This level of precision is one of the reasons LG TVs are frequently used as preview monitors in graphic design and post-production studios.

After calibration the Bravia 7 II can look significantly better. First of all, we managed to set the white balance very well, both in 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 when it comes to colors. On the Bravia 7 II Sony does not provide access to a classic CMS that would let us adjust individual hues separately. A lot is therefore left in the hands of the algorithms controlling the True RGB backlight. If the TV reproduces a specific color inaccurately, we are not always able to do anything about it. In our measurements this is most evident with some reds and blues, where errors can still be quite large. That does not, however, diminish the value of calibration. Correctly setting the white point and gamma strongly affects the overall image, so even without the ability to precisely tweak every color the difference compared with the factory settings is noticeable.

In this section, we will revisit the smooth transition function while also examining how the TV handles lower-quality content. As we’ve found, the setting responsible for smooth gradation is generally effective, though it does have its drawbacks. While the function works well in SDR content, it becomes less useful in HDR content. Even at the lowest setting, it can blur important details, so we advise against using it in such cases.

The image scaling on the LG B4 is assessed moderately positively. While there is no noticeable edge doubling, the image tends to be somewhat "soft." This can be adjusted by tweaking the sharpness slider to improve the clarity.

Upscaling and digital processing are among the Bravia 7 II's strongest assets and one of Sony's biggest advantages over the competition. Sony has handled digital image processing well for years, and it shows here too. Above all, the "Smooth Gradation" function works very well; it can smooth weak tonal transitions in lower-quality content. It's safest to set it to Low, but we'd comfortably recommend Medium as well. The effect is stronger then, and the TV still handles details very delicately. Some fine detail may be slightly smoothed, but Sony does it much more subtly than many other brands. The upscaling itself also performs very well. Lower-resolution sources are well upscaled to 4K; the picture looks clean and retains a lot of detail. Of course the TV won't magically turn native HD material into true 4K, but the Bravia 7 II does a very good job with what can be extracted from such a source.

The maximum refresh rate on the LG B4 is 120 Hz, the bare minimum for those requiring high image fluidity. The manufacturer has equipped the TV with a multi-stage motion smoother called "TruMotion." This feature is split into two sliders: one controls the sharpness of moving images (De-Blur) and the other adjusts judder (De-Judder). Both sliders can be set between 0 and 10, with each level affecting the smoothness, so users can easily find their preferred setting.

The LG OLED B4 panel boasts an impressive average response time of 0.1 ms (based on our measurements), delivering an exceptionally clear image that surpasses the capabilities of LCD TVs, which often have response times of several milliseconds. This is particularly noticeable in the "UFO Test" images, where no trailing blur is visible behind moving objects.

The Bravia 7 II uses a 120 Hz panel, so in terms of motion smoothness it delivers everything you’d expect from a TV in this class. With sports or games at 120 fps the picture is appropriately smooth, and for movies Sony provides an advanced motion smoothing feature. You can adjust the level of interpolation separately and decide whether you want to keep a more cinematic motion or achieve noticeably smoother motion. The issue of motion blur is a bit worse. The VA panel used isn’t among the fastest, and you can notice a slight trail behind moving objects, especially on darker backgrounds. It’s not at a level that will be highly distracting during normal viewing, but last year’s Bravia 7 performed better in this respect and had a noticeably faster panel.

The LG B4 has four full HDMI 2.1 ports, each providing 48Gbps bandwidth. This ensures smooth activation of all relevant features without issues, making the television highly suitable for gaming. With its low input lag and extensive functionality, including well-implemented HGIG mode and Dolby Vision gaming with low latency, the B4 is a strong contender for gamers who demand high quality.

A standout feature is GameBar, which allows for on-the-fly adjustments without interrupting gameplay, as well as image adaptations for those with visual impairments. Another key point is that when VRR technology is enabled, the television maintains its contrast, thanks to the OLED panel's structure, though slight flickering in grey shades is to be expected.

In conclusion, the LG B4 is an ideal choice for gamers, seamlessly combining high performance with excellent gaming features. Its 120Hz panel and HDMI 2.1 ports make it a standout option for those seeking top-tier gaming experiences.

The Bravia 7 II essentially has everything you'd expect 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. There's also a properly working HGiG, which means that after setting up HDR on the console the TV won't try to further brighten the image on its own. Just remember to turn off tone mapping in the TV's menu. Dolby Vision in game mode is another plus, especially for Xbox owners. Sony also includes its own Game Menu. From it you can quickly view key signal information, check VRR, or change gaming settings without digging through the TV's entire menu. The only thing missing from the feature list is support for 1440p at 120 Hz.

Our biggest complaint is not really with the features themselves, but with the connectors. The Bravia 7 II has four HDMI ports, but only two of them support full HDMI 2.1 at 48 Gbps. One of those is also an eARC port. So if you connect a soundbar or AV receiver via HDMI, in practice you have only one full HDMI 2.1 port 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 get tight. That's hard to justify from Sony. Two HDMI 2.1 ports might be acceptable in cheaper TVs, but in a model of this class, especially in 2026, we'd expect all four ports to be HDMI 2.1.