Samsung QLED Q70D / Q74D / Q77D vs Samsung OLED S95H (S99H) (QD-OLED)

The brightness of the Samsung Q70D is fairly average, yet it delivers a noticeable HDR effect. With brightness exceeding 400 nits, the distinction between SDR and HDR materials becomes evident. As observed in the discussion about contrast and black levels, the TV's performance varies across different scenes. In a scene featuring a bright sun against a darker foreground, the measured luminance is lower. However, in a scene with a large, bright light source dominating the frame, the TV achieves its peak brightness, reaching nearly 500 nits—a commendable result for its price range and display class.

Despite these strengths, the relatively low coverage of the wide DCI-P3 color gamut occasionally results in less vivid color reproduction. Even so, the TV offers rich colors and precise shade reproduction, enhancing the movie-watching experience. Furthermore, the Q70D excels in motion blur elimination during dynamic scenes, making it a solid choice for enjoying sports broadcasts and gaming.

When it comes to brightness alone, the S99H is an astronomically bright TV. Its peak brightness in movie scenes can exceed 2800 nits! Regardless of the scene, you can count on powerful HDR effects that practically blind you, and that's exactly what we expect from a top-tier screen. It's inherent to OLED panels that in very bright, full-screen shots they won't sustain as high a brightness as they do with small highlights, but the results are still excellent. In a bright scene from the film The Meg, the sun still exceeded 2200 nits. That means the S99H was able to maintain higher brightness than most Mini LED screens on the market. In terms of brightness, the S99H is currently the best OLED TV we've tested.

Color gamut coverage

The S99H also handles color exceptionally well, which is a direct result of the QD-OLED panel used here. Regardless of the test scenario, whether synthetic test patterns or measurements with film material in the background, the results stayed at a very high level. The S99H easily covers almost 100% of the DCI-P3 gamut, and for the most demanding color space it reaches nearly 90% of BT.2020. That's top-tier performance on the market. These results match what we saw in the new SQD-Mini-LED screens, and in real movie scenes they even outperform RGB Mini LED displays.

The best factory mode on the Samsung Q70D is "Filmmaker," and it is the one we used when conducting various tests. Before the calibration process, it had several flaws that effectively prevented the conveyance of the director's intentions. In both SDR and HDR materials, the white balance was dominated by red and green colors. As a result, there was a characteristic yellow tint on the image, causing whites to appear yellowed and creating issues with skin tones, which were noticeably too warm. The reduced gamma in the standard color gamut materials caused a significant drop in the already low contrast. This resulted in an emphasis on details in the blacks but also in blown-out images in brighter scenes. The EOTF curve, in this case, turned out to be much better and only lightened those scenes with relatively low luminance. This was clearly visible in the section where we measured the maximum brightness of the television in HDR materials. At that time, the frame from the movie "Billy Lynn" was unnaturally bright and lacking depth.

Samsung offers a whole host of picture modes and features, but as usual we recommend choosing Filmmaker Mode, especially if you want the most faithful rendering of the creators' intent. Out of the box the TV is tuned very well, though it has minor shortcomings. This mainly concerns a slight drift in white balance in SDR content and a slightly low gamma. As a result, in a darker room the image can be a bit too bright relative to the reference gamma of 2.4, which is the standard for watching films with the lights off. These are of course small issues, since overall color reproduction remains very good and the errors in ColorChecker measurements are small. However, we know that from a screen of the S99H's class you can and should expect even more, so we had it professionally calibrated.

Fortunately, Samsung provides a wide range of calibration tools in all its televisions, where we can find 2-point and 20-point grayscale adjustments as well as advanced CMS. Thanks to this, we were able to significantly improve the quality of SDR and HDR materials. The vast majority of errors have been corrected, and the image that the Samsung Q70D now generates is definitely closer to the reference. Higher deltaE errors in the high dynamic range materials are primarily due to the display's insufficient luminance.

After professional calibration, FILMMAKER mode looks virtually perfect. Because Samsung offers a rich set of advanced calibration features, we were able to tune the colors to an almost perfect level. Most importantly, we were able to even out the white balance and the gamma curve, which resulted in noticeably better contrast and a more natural image dimensionality. With a profile prepared like this, there's really nothing to nitpick or call a flaw. After calibration, the S99H is capable of delivering an essentially reference-quality image.

The function responsible for improving gradation is named "Noise Reduction" in the menu. As we have confirmed, it is worth activating as it has a positive effect on tonal transitions. More importantly, it does not negatively affect film grain or fine details, which sometimes the competition "offers" us.

Image scaling in Samsung Q70D should be rated as average. The manufacturer aims not to artificially sharpen the image but to leave it naturally softened.

The proprietary Samsung NQ4 Gen3 processor handles upscaling and digital image processing. It does a very good job scaling lower-resolution material to 4K. The picture is sharp but doesn't look artificial or overly sharpened. The only fairly specific drawback appears with very old footage shot at 480p or lower. In those cases the TV can slightly crop the edges of the image.

The processor also copes quite well with artifacts visible in low-bitrate material, for example heavily compressed YouTube videos. The noise reduction feature effectively smooths the image and reduces posterization, but it works rather aggressively. It can remove not only unwanted artifacts but also some fine details and even natural film grain. We, wanting to preserve maximum fidelity to the source material, chose not to use it. However, if someone values a clean, as-smooth-as-possible image over keeping every detail, it can be useful.

The Samsung Q70D is the first model in the manufacturer's range to feature a 120Hz panel, resulting in more advanced motion smoothing capabilities compared to lower-category models. Within the menu, three functions are dedicated to improving motion fluidity: "Motion Blur Reduction," "Judder Reduction," and "Clear Motion (LED)." The third option will be discussed separately. The first function enhances sharpness during motion, while the second adjusts the degree of smoothing. The smoothness feature on the Samsung Q70D performs well, with each setting delivering a noticeable effect. This allows viewers to customise the level of fluidity, making it suitable for those who dislike the typical stuttering of films or enjoy watching sports. The accompanying picture illustrates a configuration with mild smoothing, avoiding the soap opera effect.

The panel employed in the Samsung Q70D offers a commendable response time for its class. While it won't deliver razor-sharp motion clarity, it is a strong choice for sports enthusiasts at this price point.

Another major advantage of OLED panels is excellent motion reproduction. Thanks to the pixels' near instant response time, the Samsung S99H practically produces no smearing. Fast-moving objects don't show noticeable halos or trailing artifacts, so the TV performs very well for both watching sports and gaming. One quirk of OLED screens compared with LCDs is how they render low frame rate material. With very slow camera movement the image can appear noticeably more stuttery. This can be quite effectively mitigated using a frame interpolation system. Samsung lets you adjust judder reduction and blur reduction separately, making it easy to find a compromise between smoother motion and preserving the cinematic character of the content.

The tested television, Samsung Q70D, has four HDMI 2.1 ports, all offering a bandwidth of 40 Gbps. Despite this, no negative effects were noticed during testing. More importantly, the TV supports all features associated with the HDMI 2.1 standard. This will certainly please gamers, as it ensures optimal gaming performance using a console or a PC. While HDR Dolby Vision is absent, the correct implementation of HGIG mode and the absence of any calibration checkerboard issues are noteworthy. Additionally, Samsung stands out by allowing gaming with the smoothness enhancer activated without significant performance degradation. This means that 30 fps titles are perceived similarly to those running at a native 60 frames per second.

Samsung was one of the first manufacturers to introduce the Game Bar, which has been consistently improved. It provides all necessary gameplay information and allows users to adjust "on the fly."

In summary, the Samsung Q70D performs excellently with both consoles and computers. All functions worked seamlessly, and there were no issues. The ability to activate the smoothness enhancer without a noticeable increase in input lag is a game-changing feature.

Samsung S99H is also an excellent TV for gamers. It offers almost every useful feature... well, maybe except the obvious lack of Dolby Vision for Xbox consoles. It's equipped with four fully functional HDMI 2.1 ports with the full 48 Gbps bandwidth. Thanks to that we can easily use frame-rate synchronization VRR and automatic low-latency mode (ALLM). This year Samsung also has no issues with proper HGiG support, so HDR setup on a console is quick and without unnecessary complications. Samsung is also known for interesting extras in its TVs. In the Game Bar menu you'll find options to add an on-screen crosshair, enlarge the mini-map, or change the aspect ratio of the displayed image (PC).

Particularly noteworthy is Samsung's feature: Game Motion Plus. It's Samsung's proprietary motion-smoothing system that uses interpolation to increase smoothness in games. Input lag then rises to around 40 to 50 ms (depending on the strength of the setting), which is an excellent result compared to the competition. The system makes gameplay noticeably smoother. So if someone has their eye on a demanding game (e.g., GTA 6 😉) that runs at only 30 frames per second on console, the S99H can display it much more smoothly than competing models.