LG 55 B4 vs Samsung S85H

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.

Interestingly, the new WOLED SE panel has brought a slight improvement in brightness to the S85 series. In the same movie scenes the previous year's model stayed closer to about 700 nits, while the S85H can reach around 800 nits. Of course this isn't a change that completely transforms the HDR experience, but that extra headroom is noticeable especially with small highlights, reflections, and stronger special effects. Around 800 nits is already a very good result for an entry-level OLED and in most films it's enough for HDR to have the right impact. Bright elements can clearly stand out from perfect black, and that contrast still does most of the heavy lifting here. You should remember the typical limitation of organic technology, though. When a very bright scene covers a large part of the screen, brightness can drop by almost half. This is the result of the panel's protection mechanisms, which limit its power with large bright areas.

Colors

The S85H can produce very pleasant, saturated colors and in most HDR films it looks really good in that respect. We measured roughly 95% DCI-P3 coverage, so the palette most often used in movies is reproduced to a very large degree. Skin tones, greens, and stronger reds still have appropriate intensity, and during normal viewing it's hard to fault them. Only when you look more broadly at BT.2020 do the limitations of the new WOLED SE panel become apparent. Coverage was around 70%, a bit less than in previous-generation WOLEDs and noticeably less than in QD-OLED panels. In films this isn't a major loss, because most productions rarely use such highly saturated colors. You notice it more often in games, where developers are much more likely to employ more intense colors.

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 color we, of course, selected Filmmaker mode, and in SDR our S85H unit was very well calibrated out of the box. The biggest deviation appears in the white balance, where a bit of blue drops out as brightness increases. In practice this means whites and grays have a slightly warmer tint than they should. It's not a major error and during normal viewing it generally isn't very noticeable. Gamma also stays close to the reference value, so the image is neither overly bright nor unnecessarily dim. The S85H's SDR picture quality is therefore very good straight out of the box. A few more imperfections show up in HDR. Here the white balance shifts more as brightness increases, with blue becoming dominant and the red component noticeably lacking. That also leads to larger errors in some colors. These aren't yet distortions that completely change the character of the image, but compared directly with the reference the difference is easier to spot. Overall, Filmmaker mode is a very good starting point before professional 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.

Calibration yields very good results on the S85H. First, the white balance can be set almost perfectly, which removes the slightly too-warm image cast that was visible earlier in SDR. Color reproduction itself also improves significantly; most errors drop to a very low level, and in everyday viewing it's hard to notice any visible inaccuracies. You can also improve a lot in HDR, although some issues remain due to the TV's inherent characteristics. The S85H doesn't always perfectly follow the brightness curve. The darkest areas are slightly boosted, and as you approach the panel's limits you can see small deviations in the brightest highlights. On top of that there's limited coverage of the wider BT.2020 gamut, which no calibration can of course overcome. Despite this, the end result is very good, and after calibration the S85H can deliver a well-tuned, natural image.

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.

For the S85H, Samsung used the same proprietary NQ4 Gen2 AI processor as in last year’s S85F, and in terms of digital image processing it performs quite well. Upscaling is one of this model’s strengths. Lower-resolution content is well sharpened, edges look natural, and the image doesn’t feel overly artificial. Just bear in mind a common Samsung quirk: at very low resolutions you can’t completely disable overscan, so the TV may slightly crop the left edge of the image. The "noise reduction" function, which smooths weaker tonal transitions, also works very well. The processor can effectively remove posterization and other imperfections visible in lower-quality material. However, you need to be careful with the strength of this feature, because Samsung can be fairly aggressive here. When it’s enabled, along with unwanted artifacts, fine image details such as the texture of skin or clothing can start to disappear.

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 S85H uses an OLED panel, so it performs excellently when it comes to motion blur. Pixels respond virtually instantly, so moving objects don’t leave the characteristic ghosting seen on some LCD TVs. This is especially noticeable with sports or fast-paced games, where the image stays very clean even during rapid motion. The panel runs at 120 Hz. That’s more than enough for movies, TV series, sports, or console gaming. It’s a bit of a shame Samsung didn’t include a higher refresh rate aimed at PC gamers, since more and more TVs now offer 144 or even 165 Hz at 4K. However, that doesn’t affect motion perception in films or sports. There’s also the classic motion smoothing feature with two settings, blur reduction and judder reduction. So you can choose whether films should keep their cinematic 24 frames per second or if you prefer to smooth them a bit. The S85H gives you plenty of flexibility here, and the interpolation works well and, with reasonable settings, doesn’t produce too many artifacts.

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 Samsung S85H is very well set up for gaming, whether you connect a console or a PC. The manufacturer didn’t skimp on ports and all four HDMI inputs support full HDMI 2.1. That means you can use 4K at 120 Hz, VRR, and ALLM without worrying which input to plug your console into. With several devices that matters, because you don’t have to choose between a console, a PC, or a soundbar connected via eARC. The feature set itself is very comprehensive. The S85H supports VRR, FreeSync, and automatic switching to game mode, and Samsung offers its comprehensive Game Bar, which lets you quickly view key signal parameters and change settings without leaving the game. The only real omission is Dolby Vision, which will matter mainly to Xbox owners. That’s a typical trait of Samsung TVs. Game Motion Plus performs very well and is one of the features that have set Samsung TVs apart for years. It smooths motion in games running at 30 or 60 fps, but does so without as large an increase in input lag as traditional motion smoothing. In practice, with more relaxed games, racing titles, or action games this can really improve perceived motion, especially if you’re sensitive to low framerates.