LG 55 B4 vs Samsung U8000F (IPS)

The brightness results in HDR materials for LG B4 are very good. It is true that none of them exceed 1000 nits, although the stability of luminance is excellent and looks practically the same in every scenario. The only moment where the tested television performs worse is the last of the scenes, although this should not be surprising. Large frames filled with a lot of white have always been, and probably will continue to be, somewhat of a weakness for OLED televisions. However, the combination of perfect contrast, black levels, and brightness of LG B4 allows for a full experience of the HDR effect. Additionally, the incredibly high coverage of the DCI-P3 colour gamut deserves recognition, reaching 99%. This makes the colours look incredibly vivid and striking.

Better does not mean good – and that is exactly how to summarise the capabilities of U8092F when it comes to displaying bright movie scenes in HDR mode. The brightness of the panel is just under 250 nits, which is definitely too little to enjoy any light effects. An interesting situation was observed during the measurement of the fourth scene from the film Sicario 2 – the television clearly dimmed the entire screen in an attempt to achieve better black levels (which remain weak anyway). One might even suggest that the device is using some form of 'global dimming', but unfortunately – the results are still very poor. To make matters worse, the television does not support a wide colour gamut – the coverage of the DCI-P3 space is around 80%, so one cannot expect truly vibrant colours. The HDR image here looks more like a slightly brightened SDR, and it is this form that we would suggest sticking to when it comes to this television.

The best factory mode prepared by the manufacturer is "Filmmaker," which is exactly what we used throughout the entire testing procedure. We must admit that the unit we received out of the box had quite good colour reproduction. The biggest problem in both SDR and HDR content turned out to be white balance. In the former, a strong red hue was evident, causing the displayed image to have a pronounced yellow tint, particularly noticeable on skin tones and whites. In higher quality materials, this colour was also accentuated, but due to a lack of blue, there were also signs of green visible. Apart from these issues, we also encountered problems with grayscale and the colours themselves.

The Samsung U8000F has been tested in the best possible picture mode built into the television, namely Filmmaker Mode. This mode should – at least in theory – offer a cinematic, reference picture without unnecessary enhancements. In the case of SDR content (mainly HD/SD), the television, out of the box, showed itself surprisingly well. Errors in white balance hovered around a value of 3, which is roughly on the edge of perceptibility. The only complaint could be about brightness management – the gamma graph showed a slight tendency to lighten or darken certain sections, but even so, the overall performance is quite good for this price segment.

Unfortunately, it looks much worse in HDR mode. Although the white balance was not terrible, the television had significant colour errors – particularly evident in the Color Checker graph, where almost every sample hit outside the target point. The picture in HDR simply looks unnatural, and the colours can be shifted, dull, or too cool. This largely stems from the fact that the U8000F does not support a wide colour gamut (DCI-P3). The television is physically unable to display correct colours in the HDR standard – and unfortunately, this is felt in every more demanding material.

LG B4 has been providing very advanced calibration tools in its televisions for years. We can even say that as the only manufacturer on the market, it allows for such deep intervention in image adjustment. It is thanks to these tools that we were able to calibrate the device so well. Evidence of this is the extremely low deltaE errors, which can be said to be at a reference level. Both SDR and HDR materials now look exactly as intended by the film director. It is no coincidence that televisions of this brand are most often used as preview screens for various graphic or post-production studios.

Although the U8000F already offered a fairly well-balanced image in SDR straight out of the box, we were able to refine it a bit further. We managed to eliminate a slight purple tint and adjust the gamma to a more sensible level. However, the television still has a tendency to overexpose the smallest and brightest parts of the image – the gamma chart shows a characteristic 'dip' that is difficult to completely straighten out.

Unfortunately, the situation is worse in HDR. It's hard to speak of any significant improvement here – the television is simply not designed for HDR content. We tried to correct the image in the advanced settings, but despite our efforts, the colour errors remained substantial – a delta E above 7 indicates very noticeable deviations. It's a bit disappointing, but that's the nature of budget construction. In SDR, the U8000F performs reasonably well, whereas HDR is just not its league.

In this paragraph, we will take another look at the function for smoothing tonal transitions, but we will also check how the television handles lower quality material. As we have managed to verify, the setting responsible for smooth gradation works quite efficiently, although it has its weaker moments. Just as the function works correctly in SDR content, it becomes rather useless in HDR content. Even at the lowest of the options, it blurs essential details, which is why we advise against using it.

The image scaling on LG B4 is rated rather moderately positively. Although there is no edge doubling, the image itself is naturally "soft." We can change this by adjusting the sharpness slider.

When it comes to how the Samsung U8000F handles lower quality materials, we must admit that Samsung has made progress compared to its predecessor from last year – namely the DU7192 model, which theoretically occupies the same spot in the range.

This year's model has been equipped with a feature that enhances the fluidity of tonal transitions, which has been implemented much better than last year. Yes, the television still uses fairly strong algorithms that can distort details or remove film grain, but despite that – it can be confidently said that it works effectively.

However, not everything has gone perfectly. The U8000F has noticeable issues with slight image stuttering when watching very old content in very low resolution. If someone plans to play their old VHS tape, they must reckon with the fact that the image may appear slightly "choppy".

The maximum refresh rate that we can set on the LG B4 is 120 Hz. This is the absolute minimum for those requiring high image fluidity. The manufacturer has implemented a multi-step motion smoother called "TruMotion". It has been divided into two separate sliders adjusting the sharpness of moving images (De-Blur) and jitter (De-Judder). Both sliders can be set in the range from 0 to 10, with each degree affecting the level of fluidity, so everyone can find their golden mean.

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 televisions, whose response times can be as high as several milliseconds. This is clearly evident in the pictures from the "UFO Test", showing no trail following the object.

The Samsung U8000F is equipped with a 60 Hz panel, so it's clear from the outset that we shouldn't expect miracles. It's simply the standard in this class – sufficient for everyday viewing but without any fireworks.

The television offers a single motion smoothing slider – a function called “Motion Blur Reduction”, which allows us to adjust the smoothness of the image in films. Higher settings provide a more “theatrical” and smoothed effect, while lower settings maintain the original character of the film with a slight 24p effect. An interesting feature is “LED Clear Motion”, which is a BFI mode – that inserts black frames between frames of the image to improve motion clarity. However, in practice, the screen flickers quite a bit when this feature is activated, and it should be regarded more as an experiment than something that genuinely enhances the comfort of gaming.

The LG B4 television is equipped with four fully-fledged HDMI 2.1 ports with a full bandwidth of 48Gbps. All features that are identical to this standard were activated without any issues, and throughout the entire testing process, they did not cause any problems. The combination of such extensive functionality and low input lag suggests that the tested television is truly made for gaming. This is not surprising, considering that the manufacturer has always placed great emphasis on this. Therefore, we can enjoy both the properly implemented HGIG mode and gaming in Dolby Vision with low latency. This pairing will certainly attract the attention of all passionate gamers for whom quality is paramount.

An additional standard in televisions from this Korean manufacturer is the implementation of GameBar, allowing for quick adjustment of settings "on the fly," without the need to exit the game. It also enables image adjustments for individuals with visual impairments, which is a very nice touch. Another important piece of information is that when VRR technology is enabled, we will not experience a drop in contrast. This is thanks to the construction of the panel and the lack of conventional backlighting. However, it is normal for shades of grey to flicker slightly; nevertheless, this is a characteristic feature of this function regardless of the manufacturer or television.

In summary: the LG B4, like all of the manufacturer’s OLEDs equipped with 120Hz panels and HDMI 2.1 ports, creates a harmonious whole with the console. In practice, this is a comprehensive television, and if we expect the highest possible efficiency in gaming, B4 will be the ideal choice.

The Samsung U8000F offers a basic set of features for gamers, which may still prove sufficient for less demanding users. It includes an automatic game mode – upon launching a game on the console, the television automatically switches to low latency mode, significantly improving response times. We also find a VRR feature, meaning variable refresh rate, which operates within a range of 48 to 60 Hz. This means that both Xbox and PS5 will not produce the effect of screen tearing – provided, of course, we stay within this range.

Unfortunately, that is about it when it comes to advantages. Add-ons like Game Bar or higher refresh rates are reserved for higher models of Samsung's 2025 line. In theory, the television also supports the HGiG function, which should adjust HDR images to the intentions of game developers. Unfortunately – despite this feature appearing in brochures and retail materials – its configuration on the Xbox console has proven to be... impossible in practice.