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

The HDR performance of the LG OLED C4 is impressive, firmly placing it in the higher tier. Most films exceed 700 nits, delivering a highly realistic image. While none surpass the 1,000-nit mark, the combination of these results with the TV’s infinite contrast and perfect blacks significantly enhances the visual experience. The final scene, with a full-screen flash of sunlight, is slightly less bright than the others but still maintains a solid level of brightness. Another highlight is the excellent DCI-P3 colour gamut coverage, which ensures incredibly vibrant colours. The HDR technology in the LG OLED C4 delivers exceptional colour and detail reproduction. The dynamic tone mapping feature optimises brightness levels, ensuring ideal light reproduction in every scene, even in the most demanding high-dynamic films.

The new generation of QD-OLED panels in the Samsung S95F shows its full potential, and the brightness results are absolutely stunning. In test film scenes, such as "Life of Pi" or "Sicario 2," where smaller light elements appear – stars, the moon, or headlights – the TV was able 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 TVs, we have millions of glowing pixels here, allowing the TV to fully showcase its power without technological compromises. Of course, since it 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 definitely exceeds what any OLEDs, both QD-OLED and WOLED, have offered so far. The color reproduction also deserves special attention. Thanks to QD-OLED technology, the TV achieves almost 100% coverage of the DCI-P3 color palette and about 80% in BT.2020. These values make the HDR image not only dazzling with brightness but also captivating with a richness of colors.

The best factory mode on the tested television was "Filmmaker," which served as the basis for all evaluations. In terms of colour reproduction, this mode performed reasonably well; however, certain flaws significantly detracted from the overall viewing experience. The most fundamental issue was the white balance, which exhibited a noticeable dominance of red, skewing the image characteristics. This resulted in a pronounced yellow tint to whites and a general shift of all colours towards warmer tones.

The gamma, an equally crucial—if not more important—aspect, was notably lowered, leading to a marked reduction in contrast. Additionally, the television frequently lost detail at the start of the gamma curve. These issues were most apparent in SDR content.

When examining HDR materials, the same yellowing effect in the white balance was observed, as seen with SDR content. However, the EOTF curve, which replaces the gamma curve for HDR, was near perfect and left little room for criticism.

The best picture mode right out of the box is undoubtedly Filmmaker Mode – a mode that Samsung has been using for several years, designed to faithfully represent the creators' intentions. In SDR content, its implementation is not bad, although some imperfections can be noticed. The picture is slightly dimmed, and the screen has a slight pinkish tint resulting from the predominance of red and blue in the white balance. Color 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 begins to notice differences.

However, much larger problems arise in HDR content. Here, the white balance was not such a significant issue – a slight excess of blue did not cause major problems. The issue became managing brightness. In practice, the TV "overexposed" the image too much, causing details in the blacks to completely disappear. The final effect was far from what was expected, and the color errors in this mode became really large. It's hard to say why such a design decision was made, but it was clear that the factory HDR settings did not allow this TV to showcase its full potential.

As mentioned, LG televisions come with advanced tools to facilitate an accurate calibration process. By utilising these tools, we meticulously adjusted the image to align with the director’s original vision. Without overstating, the results were outstanding. Both SDR and HDR content now achieve a level of visual fidelity that reflects how films are intended to be seen.

Examining the colour accuracy on the "ColourChecker" palette reveals impressive results, with almost all colour errors falling below a delta of "1," aside from two minor exceptions. Post-calibration, the LG OLED C4 demonstrated a marked improvement in colour reproduction, particularly in SDR and HDR modes. Testing the TV after calibration highlighted its capacity for delivering exceptionally accurate colours, underlining the high calibre of this model. The LG C41LA offers a stunningly precise colour palette, sure to satisfy even the most discerning viewers.

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

In HDR materials, calibration also brought significant improvement. The tendency of the television to overexpose the image was successfully controlled, as confirmed by the analysis of the EOTF curve. A slight tendency to brighten the entire scene or occasional loss of details in the blacks can still be observed; however, it does not significantly impact the overall perception. After calibration, the S95F showcases its full potential and can be described as one of the best televisions on the market!

Let us revisit the function responsible for smooth gradation and consider its role in improving lower-quality materials. The default smoothing of tonal transitions, while decent, can be further enhanced. The feature includes a slider for adjusting its strength, and we recommend selecting the first option. This setting strikes a balance, offering excellent results without compromising important details through unnecessary blurring.

The image scaling on the LG C4 is commendable, though not entirely without flaws. By default, the image appears slightly sharper, though not to an intrusive degree. While jagged edges on elements like trees are occasionally visible, this issue is relatively minor compared to similar offerings from other manufacturers.

The 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 – such as older recordings or videos from YouTube – become soft and plastic when this feature is turned on, resembling an image digitally smoothed in a graphics program. Unfortunately, this also causes the natural film grain, which often adds authenticity to the image, to disappear. Fortunately, the TV does not lose too many fine details, such as in skin textures or elements of the surroundings. Therefore, this feature is best used with caution – depending on preferences, one can achieve a smooth image, but less natural, or one that is more faithful to the original. In our opinion, the most universal choice is the “Standard” setting.

The image scaling performs significantly better. The TV handles lower resolution materials well – even 576p content looks quite decent, although a slight blockiness can be noticed. Overall, the effect is very good, although it is somewhat inferior to 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 cropping of the left edge of the image.

The LG G4 supports a maximum refresh rate of 144 Hz, achievable only when connected to a high-performance PC. Otherwise, the television operates at a maximum of 120 Hz, the recommended setting for viewing sports or content with fast-paced motion. For those prioritising smooth image quality, LG has included a versatile motion smoothing feature called "TrueMotion." This function is split into two adjustable sliders: De-Blur, which sharpens moving images, and De-Judder, which reduces jitter. Both sliders offer a range of settings from 0 to 10, enabling users to fine-tune the motion smoothness to their preference.

The LG OLED C4 boasts an impressive average response time of less than 1 millisecond, as confirmed by our measurements. This results in exceptional image clarity, far surpassing LCD televisions, which often have response times of several milliseconds. This clarity is evident in tests like the "UFO Test," where no trailing blur is visible behind moving objects.

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

The LG C4, like nearly all OLED televisions from the manufacturer, excels in its compatibility with consoles and PCs. With the inclusion of four full-bandwidth HDMI 2.1 ports supporting 48 Gbps, the TV incorporates a range of features to enhance the gaming experience. Notably, it offers simultaneous support for FreeSync and G-Sync, making it an ideal choice for gamers using AMD or Nvidia graphics cards. For those seeking the best possible gaming quality, the integration of HDR Dolby Vision and HGIG mode is particularly impressive. HDR Dolby Vision operates with remarkably low input lag across all settings, ensuring smooth and responsive gameplay.

A standout feature in LG's televisions is the GameBar, which allows users to adjust settings in real-time without leaving the game. This includes options for customising the image for viewers with visual impairments, a thoughtful addition. Additionally, enabling VRR (Variable Refresh Rate) does not result in a loss of contrast—a benefit of the OLED panel's self-emissive technology, eliminating the need for conventional backlighting. While some slight flickering of grey tones may occur, this is a characteristic of VRR technology across all manufacturers.

In summary: The LG C4, like the brand's other OLED models equipped with high-refresh-rate panels and HDMI 2.1, provides a seamless and immersive gaming experience. For gamers demanding top-tier performance, this TV is an outstanding choice.

The same advantages of low motion blur and excellent motion fluidity characteristic of OLED panels are just the beginning, as the Samsung S95F was 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 complete set of gaming features: variable refresh rate (VRR), automatic game mode (ALLM), as well as a very well-implemented HGiG standard, which allows HDR titles to appear as their creators intended. The whole thing is complemented by the Game Bar – a clear settings hub where we can preview and change all key picture parameters with one movement. The proprietary motion smoother Game Motion Plus also deserves praise, as it can smooth out animation, which is particularly useful in productions running at 60 frames, where stability is not always exemplary. Although support for Dolby Vision in games is lacking, it is hard to consider this a serious drawback – Samsung compensates for it with other solutions. This is one of the best, if not the best, gaming TVs available today on the market.