LG OLED C4 vs SAMSUNG OLED S95F (QD-OLED)

The results of HDR materials are definitely among the better ones. Practically every film significantly exceeds the 700 nits barrier, which allows for a very realistic image. Of course, none of them surpasses the magical thousand, however, the combination of such results along with unlimited contrast and black effectively boosts the visual outcome. The last of the scenes, featuring a fullscreen sun burst, is indeed less bright than the others, although it still represents a respectable level. It's also worth mentioning the excellent coverage of the DCI-P3 colour palette, which will enable the achievement of exceptionally vivid colours.

The new generation of QD-OLED panels in Samsung's S95F showcases its full potential, and the brightness results are simply astounding. In test film scenes, such as “Life of Pi” or “Sicario 2”, where smaller light elements appear – stars, the moon, or spotlights – the television managed to achieve over 2000 nits of brightness. This is a result that surpasses even most top Mini-LED models.

The secret lies in the technology itself – instead of a limited number of dimming zones like in Mini-LED televisions, here we have millions of glowing pixels, allowing the television to fully demonstrate its power without technological compromises. Of course, since it is still an organic panel, in scenes that are full-screen and flooded with white – like in the final sequence from The Meg – brightness drops to around 1400 nits. Nevertheless, the result remains excellent and definitely exceeds what any OLEDs, both QD-OLED and WOLED, have offered so far. The colour reproduction is also particularly noteworthy. Thanks to QD-OLED technology, the television achieves almost 100% coverage of the DCI-P3 colour space and around 80% in BT.2020. These values make HDR images not only dazzling in brightness but also stunning in their range of colours.

The best factory mode implemented in the tested television was "Filmmaker". That was the one we used during all tests. This mode, in terms of colour reproduction, turned out to be quite decent, although other flaws effectively detracted from the enjoyment of the viewing experience. Starting with the most basic one, which is white balance, it was easy to notice that this was marked by a dominance of red, which completely altered the characteristics of the picture. We could see a strong yellowing of the whites and a shift of all colours to warmer tones. The gamma, which is a graph as equally important, if not more so, was quite severely reduced, resulting in a significant drop in contrast, except for the start of the graph, where the television insidiously lost details. That’s all regarding SDR materials. Looking closely at films with a wide dynamic range, we can observe exactly the same phenomenon of white balance yellowing as in films with a standard colour palette. The EOTF curve, which replaces the gamma chart for us, is practically perfect and cannot be faulted.

The best picture mode straight out of the box is undoubtedly Filmmaker Mode – a mode that Samsung has been using for several years and which is intended to faithfully convey the creators' vision. In SDR content, its implementation is not bad, although some imperfections can be noticed. The image is slightly dimmed, and the screen has a subtle pinkish hue resulting from an excess of red and blue in the white balance. Colour errors remained at a level of 3–4 ΔE units – and for the uninitiated: a value above 3 is the threshold where the average human eye starts to notice differences.

Much bigger problems arise in HDR content, however. Here, the white balance was not as much of an issue – a slight excess of blue did not significantly hinder things. The problem became brightness management. In practice, the TV "blows out" the image too much, causing details in the blacks to completely disappear. The final effect was far from what was expected, and the colour errors in this mode became quite significant. It’s hard to say why such a design decision was made, but it was clear that the factory HDR settings do not allow this TV to showcase its full potential.

As we mentioned earlier, LG televisions are equipped with advanced tools for carrying out the calibration process. We used them to model the picture in line with what the director envisioned. And without modesty, we must admit that we achieved this phenomenally. Both SDR and HDR materials present a level that clearly indicates this is how a film should look. It's worth taking a look at the colour errors on the "ColorChecker" palette, where practically none of them exceed "1", except for two samples.

After calibration, it was possible to make subtle adjustments to the white balance and significantly improve the image characteristics. In SDR content, the quality has become practically reference-level – most colour errors have dropped below a ΔE value of 1, which is the level at which the human eye can no longer perceive differences. This is a result that places the S95F among the absolute top TV models available on the market.

In HDR material, calibration also brought a significant improvement. The tendency of the TV to blow out the image was managed, as confirmed by the analysis of the EOTF curve. There is still a slight tendency to brighten the entire scene or occasional loss of detail in the blacks, but this does not significantly affect the overall perception. After calibration, the S95F shows its full potential and can be regarded as one of the best TVs on the market!

Once again, we will take a look at the feature responsible for gentle gradation, but we will also address the one that aims to enhance the quality of lower-quality materials. The default smoothing of tonal transitions, as we could see, was not the worst, but it can be improved further. The function has a slider that allows us to adjust its intensity. We recommend using the former, as it produces very good results and does not blur important details.

Image scaling on LG C4 is quite good, however, it cannot be said to be without flaws. The image is slightly sharper by default, although not in a very noticeable way. While jagged edges of trees can be seen, it is not a major issue when compared to other manufacturers.

Samsung S95F offers a noise reduction feature that smooths tonal transitions. It works very effectively, but in practice, it can be too aggressive. Materials of lower quality – e.g. older recordings or videos from YouTube – become soft and plastic when it is enabled, resembling an image digitally smoothed in graphic software. Unfortunately, the natural film grain, which often adds authenticity to the image, disappears in the process. Fortunately, the television does not lose too much fine detail, e.g. in skin textures or environmental elements. Therefore, this feature is best used judiciously – depending on preferences, one can achieve a smooth but less natural image or one that is truer to the original. In our opinion, the most universal choice is the “Standard” setting.

Image scaling performs significantly better. The television handles lower resolution materials well – even 576p content looks quite decent, though slight blockiness can be observed. Overall, the effect is very good, although it slightly trails behind what Sony Bravia 8 (II) or LG G5 can achieve. It’s also worth mentioning a small imperfection of the S95F – in older materials, overscan may occur, causing a slight trimming of the left edge of the image.

The maximum refresh rate we can set on the LG G4 is 144 Hz. Naturally, this is only possible when connecting the TV to a very powerful PC. Otherwise, we will operate at a maximum refresh rate of 120 Hz, which is recommended if we primarily want to watch sports or content with a lot of motion dynamics. For those who require high fluidity of the image, the manufacturer has implemented a multi-level motion smoother called "TrueMotion". It has been divided into two separate sliders that adjust the sharpness of moving images (De-Blur) and judder (De-Judder). Both sliders can be set in the range of 0 to 10, with each degree affecting the level of smoothing, allowing everyone to find their sweet spot.

The panel of the LG OLED C4 features an average response time of less than 1 ms (which directly results from our measurements), enabling the achievement of an extremely clear image, unattainable for LCD TVs, which can have response times of up to several milliseconds. This is clearly evident in the images from the "UFO Test," which show no trailing blur behind the object.

The Samsung S95F excels in motion fluidity, presenting phenomenal performance. The panel operates at a native resolution of 4K with a refresh rate of up to 165 Hz, and when combined with QD-OLED organic technology, it delivers incredible results. Sports and games look sensational – the picture is fast, dynamic, and very natural. Additionally, the built-in motion smoother and blur reduction system allow you to customise the character of the image to your own preferences. You can opt for a more 'framey' effect with visible film texture or a smooth, cinematic spectacle. Every viewer will find a setting that suits them.

We can now say that LG C4, like practically every OLED television from the manufacturer, is exceptionally good in terms of cooperation with consoles and PCs. Thanks to the implementation of four full-bandwidth HDMI 2.1 ports at 48 Gbps, the manufacturer has embedded all the features that enhance gaming comfort, including simultaneous support for FreeSync and G-Sync technologies. With such a tandem, players with graphics cards from AMD or nVidia can safely choose C4. However, what should please gamers demanding the highest possible quality the most is the simultaneous implementation of HDR Dolby Vision and HGIG mode. The former is particularly important as it operates with extremely low input lag in all settings.

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 allows for image adjustments for people with visual impairments, which is an incredibly nice touch. Another important piece of information is that when VRR technology is enabled, we won’t experience a drop in contrast. This is, of course, due to the design of the panel and the absence of conventional backlighting. It is, however, normal for shades of grey to flicker slightly, although this is a characteristic feature of this function regardless of the manufacturer and television.

In summary: LG C4, just like all the manufacturer's OLEDs equipped with high-refresh-rate panels and HDMI 2.1 connections, creates a harmonious whole with consoles. In practice, it is a complete television, and if we expect the highest possible efficiency in gaming, C4 will be an ideal choice.

The same advantages of low motion blur and excellent motion fluidity characteristic of OLED panels are just the beginning, as the Samsung S95F has been designed with gamers in mind. The manufacturer has equipped it with four HDMI 2.1 ports – though limited to a bandwidth of 40 Gb/s, in practice, this has no impact on compatibility with consoles or PCs. We get a full package of gaming features: variable refresh rate (VRR), automatic game mode (ALLM), as well as a very well-implemented HGiG standard, ensuring that HDR titles look as the creators intended. This is complemented by Game Bar – a clear settings hub, where with one motion, we can preview and change all key image parameters. The proprietary motion smoother Game Motion Plus also deserves praise, as it can smooth out animation, which is especially useful in productions running at 60 frames, where stability is not always exemplary. While there is no support for Dolby Vision in games, it’s hard to consider this a serious drawback – Samsung compensates with other solutions. This is one of the best, if not the best, gaming TVs available on the market today.