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, allowing for a very realistic image. Of course, none of them surpasses the magical thousand, yet the combination of such results and unlimited contrast and black effectively boosts the outcome optically. The last of the scenes, featuring a full-screen burst of sunlight, is actually less bright than the others, although it still represents a commendable level. It is also worth mentioning the excellent coverage of the DCI-P3 colour palette, which will allow for achieving extremely vivid colours.

The new generation of QD-OLED matrices in the Samsung S95F shows its full potential, with brightness results that are truly stunning. In test film scenes like "Life of Pi" or "Sicario 2," where smaller light elements appear – stars, the moon, or headlights – the television managed to achieve over 2000 nits of brightness. This is a result that surpasses even most top-of-the-range 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 emitting pixels, allowing the television to fully showcase its power without technological compromises. Of course, as this is still an organic panel, in full-screen scenes flooded with white – like in the final sequence of the film The Meg – the brightness drops to around 1400 nits. Nevertheless, the result remains excellent and clearly 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 nearly 100% coverage of the DCI-P3 colour space and about 80% in BT.2020. These values make HDR images not only dazzling in brightness but also captivating in the richness of colours.

The best factory mode implemented in the tested television was "Filmmaker". It was this mode that we used during all tests. This mode proved to be quite good in terms of colour reproduction; however, other shortcomings effectively detracted from the enjoyment of viewing. Starting with the most basic aspect, the white balance, it was easy to notice that it was marked by a dominance of red, which overall changed the characteristics of the image. We could thus see a strong yellowing of the whites and a shift of all colours towards warmer shades. The gamma, which is a curve just as important, if not more so, was quite significantly lowered, resulting in a considerable drop in contrast, except at the beginning of the graph, where the television insidiously lost details. That’s all regarding SDR materials. Taking a closer look at films with a wide dynamic range, we can observe exactly the same phenomenon of yellowing of the white balance as in films with a standard colour palette. The EOTF curve, which replaces our gamma curve, 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, designed to faithfully convey the creators' intent. In SDR content, its implementation is not bad, although some imperfections can be observed. The image is slightly dimmed, and the screen has a subtle pinkish tint due to the dominance of red and blue in the white balance. Colour errors were maintained at a level of 3–4 ΔE units – and for those who are not familiar: a value above 3 is the threshold at which the average human eye starts to notice differences.

However, much greater problems arise in HDR content. Here, the white balance was not such a significant issue – a slight excess of blue did not significantly hinder the viewing experience. The problem became managing brightness. In practice, the television "blasted" the image too much, causing details in the blacks to completely disappear. The final effect was far from expected, and colour errors in this mode became quite pronounced. It's hard to say why such a design decision was made, but it was evident that the factory HDR settings did not allow this television to showcase its full capabilities.

As we mentioned earlier, LG televisions are equipped with advanced tools for carrying out the calibration process. We therefore used them to model the image in the way that the director intended. And without modesty, we must admit that we achieved this phenomenally. Both SDR and HDR materials present a level that clearly indicates that this is how a film should look. It is worth looking at the colour errors on the "ColorChecker" palette here, where practically none of them exceeds "1", apart from 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 fallen below a ΔE value of 1, which is the level at which the human eye can no longer discern differences. This is a result that places the S95F among the very best televisions available on the market.

In HDR materials, the calibration also brought about a significant improvement. The television's tendency to blow out highlights has been brought under control, as confirmed by the analysis of the EOTF curve. A slight tendency to brighten the entire scene or occasional loss of detail in blacks can still be observed, but this does not significantly affect the overall perception. After calibration, the S95F reveals its full potential and can be described as one of the best televisions on the market!

Once again, we will take a look at the function responsible for smooth gradation, but we will also address the one that aims to improve the quality of lower-quality materials. The default smoothing of tonal transitions, as we have seen, was not the worst, but it can still be improved. The function has a slider, which allows us to adjust its strength. We recommend using the first one, as it yields very good results and does not blur important details.

Image scaling in 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. Admittedly, there are jagged edges on the trees, but this is not a major issue compared to other manufacturers.

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

The image scaling performs significantly better. The television handles materials of lower resolution well – even content at 576p looks quite decent, although a slight blockiness can be noticed. Overall, the effect is very good, although it somewhat falls short of what Sony Bravia 8 (II) or LG G5 can achieve. It is also worth mentioning a minor 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 that we can set on the LG G4 is 144 Hz. Naturally, this is only possible when connecting the television to a very powerful PC. In other cases, we will be operating at a maximum refresh rate of 120 Hz, which is recommended if we primarily want to watch sport or content with a lot of motion dynamics. For those requiring high fluidity of the image, the manufacturer has implemented a multi-step 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 within a range from 0 to 10, with each degree affecting the degree of smoothing, allowing everyone to find their golden mean.

The LG OLED C4 panel features an average response time of less than 1 ms (which directly results from our measurements), allowing for an incredibly clear image that is unattainable for LCD televisions, whose response times can be as high as several milliseconds. This is clearly visible in the pictures from the "UFO Test," showing no trailing blur behind the object.

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

We can already say that LG C4, like practically every OLED television from the manufacturer, is exceptionally good in terms of compatibility with consoles and PCs. Thanks to the implementation of four full bandwidth HDMI 2.1 ports at 48 Gbps, the manufacturer has included all features that enhance the gaming experience, among which we find simultaneous support for FreeSync and G-Sync technology. With such a tandem, gamers with a graphics card from AMD or Nvidia can confidently opt for C4. However, what should delight the players requiring the highest possible quality the most is the simultaneous implementation of HDR Dolby Vision and HGIG mode. The first is particularly important as it works with extremely low input lag in all settings.

A standard in the Korean manufacturer's televisions 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 visually impaired individuals, 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, of course, due to the panel's design and the absence 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 television.

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

The 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 – although limited to a bandwidth of 40 Gb/s, in practice this has no impact on compatibility with consoles or PCs. We get a full suite of gaming features: variable refresh rate (VRR), automatic game mode (ALLM), as well as a very well-implemented HGiG standard, which ensures that HDR titles look exactly as their creators intended. Completing the package is the Game Bar – a clear settings hub where we can preview and change all key image parameters with one motion. The proprietary motion smoother, Game Motion Plus, also deserves commendation, as it can smooth out animations, which is particularly useful in productions running at 60 frames, where stability is not always exemplary. While support for Dolby Vision in games is lacking, it’s hard to view this as a serious drawback – Samsung compensates with other solutions. This is one of the best, if not the best, gaming televisions available on the market today.