TCL X11L vs Samsung OLED S95H (S99H) (QD-OLED)

Such a large number of zones translated not only into deep, inky blacks but also into the panel’s brightness. The X11L is an extremely bright TV. Peak brightness can easily exceed 4000 nits, and with the special "Boost" mode enabled, under specific conditions that brightness can even hover around the marketing figures of 9000–10,000 nits. This is undoubtedly one of the brightest, if not the brightest, screens on the market. But how do those numbers translate to real-world movie measurements? The results are very good, though of course far from the marketing promises. Our measured brightness in actual movie scenes hovered around 2000–3000 nits. That’s an outstanding result, considering that the vast majority of content is produced to those brightness levels, including the rarer material mastered to 4000 nits. But it also shows that the numbers the manufacturer brags about don’t always translate directly to the video content available at home. The only "quirk" (if you can call it that) is that when very small, bright elements appear on the screen, their brightness drops below 2000 nits. The dimming algorithm does this deliberately to preserve deep blacks and minimize halo. This is entirely understandable and the effect remains very strong, but it also demonstrates that even with such powerful hardware, Mini-LED technology has its limits and does not always work without compromise. In HDR, brightness isn’t the only thing that matters; color saturation and color accuracy do as well. On the X11L these are very good thanks to the new Super QLED quantum dots (SQD). The addition of a newly applied filter delivered excellent coverage of the P3 color gamut and the ultra-wide BT.2020. Although it doesn’t reach the advertised 100% of BT.2020, values around 89–90% can be called excellent. Colors are not far off those of RGB Mini-LED panels. We can even say they’re more stable because they use a less demanding algorithm than the one RGB screens often have to deal with.

When it comes to pure brightness, the S99H is an astronomically bright TV. Its peak brightness in film scenes can exceed 2,800 nits. Whatever the scene, you can expect powerful HDR effects that are almost blinding, which is exactly what we want from a top‑tier display. By nature, an OLED panel can't maintain that extreme brightness in very bright, full‑screen frames the way it can with small bright highlights, but the results are still excellent. In a bright scene from The Meg the sun still exceeded 2,200 nits. That means the S99H was able to hold a 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.

Colour gamut coverage

The S99H also handles colours exceptionally well, thanks directly to the QD‑OLED panel used here. Whether the test used synthetic test patterns or measurements with film material in the background, the results remained very high. The S99H easily covers almost 100% of the DCI‑P3 gamut, and in the most demanding space, BT.2020 it reaches nearly 90%. That's absolute top‑tier performance. These results match what we saw in the new SQD‑Mini‑LED displays, and in real film scenes they even surpass RGB Mini LED displays.

When you switch on what should theoretically be the best Filmmaker Mode, you expect a one-to-one image of what the director saw. On the X11L it's quite good, but the mode has obvious flaws that our measurements immediately exposed. Let's start with SDR. Both the white balance and the gamma are simply miscalibrated. The white point has too much blue and red, so there's a faint pink cast on the screen. That also affects the gamma, which instead of holding the cinematic 2.4 runs closer to 2.2. What does that mean? The whole picture ends up pushed and artificially brighter. The worst, though, is saved for last: the HDR measurements. Besides the slight white balance shift, the X11L fails on the luminance management curve, the so‑called EOTF. What we saw in the measurements immediately explains what we saw earlier in films. The image is unnaturally bright because the curve massively overshoots the reference. The TV just unapologetically lifts the dark parts of the picture to create a "wow" effect, completely ignoring the director's intent.

Samsung offers a whole host of picture modes and features, but we traditionally 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 flaws. These are mainly a slight deviation in white balance in SDR content and a slightly low gamma. As a result, the picture in a dark room can be a little too bright compared with the reference value of 2.4, which is the standard for watching films with the lights off. These are, of course, small issues, because overall colour reproduction remains very good and the errors in ColorChecker measurements are not large. However, we know that for a screen of the S99H's calibre you can and should expect even more, so we subjected it to professional calibration.

After professional calibration we chiefly managed to fully master the SDR signal. The X11L responded perfectly to our adjustments. We completely straightened the white balance, removed that pink tint and set gamma to a stable 2.4. After that treatment the picture finally became consistent with the director's vision, natural and free of artificial boosts. We were also able to make minimal tweaks for HDR, but the TV's biggest flaw remained unchanged. I'm talking, of course, about how the X11L handles its brightness and how much it overshoots the EOTF curve. Unfortunately, TCL provides practically no controls to adjust this parameter. Even during professional calibration the software does not allow you to rein in that curve, so the TV in HDR will always tend to brighten the image on its own.

After professional calibration, FILMMAKER mode looks practically perfect. Because Samsung offers a rich set of advanced calibration controls, we were able to tune the colours to an almost perfect level. Above all, we managed to even out the white balance and the gamma curve, which resulted in noticeably improved contrast and correct image modelling. In a profile prepared like this there really isn't a single thing to pick apart or call a fault. After calibration, the S99H can deliver an essentially reference-quality picture.

As with the C8L we tested earlier, TCL has delivered a substantial upgrade in its flagship X series in this area. It's all down to the MediaTek Pentonic 800 processor used in this model. Thanks to it, features like smoothing tonal transitions and even upscaling content to higher resolutions finally look the way they should. The biggest Achilles' heel of previous TCL models has finally been overcome. The processor handles digital processing superbly, and in this respect the TV no longer falls short of flagship models from Korea or even the most polished ones from Japan.

Upscaling and digital image processing are handled by Samsung's proprietary NQ4 Gen3 processor. It copes very well with scaling lower-resolution content to 4K. The picture is clear without looking artificial or overly sharp. The only fairly specific drawback appears with very old material recorded at 480p or lower. In such cases the TV can slightly crop the edges of the image.

The processor also does a decent job with artefacts visible in low-bitrate material, for example in heavily compressed YouTube videos. The noise reduction function effectively smooths the picture and reduces posterisation, but it works quite aggressively. It can remove not only unwanted artefacts but also some fine detail, 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 more than keeping every detail, it may prove useful.

Spec-wise the X11L can impress, supporting refresh rates up to 144 Hz at 4K, and in Full HD it can be pushed as high as 288 Hz. From a real-world perspective, though, we were most interested in how the screen handles 120 Hz — that's the limit of today's hardware, led by current-generation consoles. How does it perform in practice? Even though it's a VA panel, the screen doesn't exhibit heavy ghosting. With very fast-moving objects you can notice a slight trail, but it's subtle enough that you hardly notice it while gaming or watching sport. Also very helpful is the motion smoothing feature called "Wyrazistość ruchów", where you can adjust motion fluidity to your liking. You'll find the recommended settings in the photo.

Another major advantage of organic panels is very good motion handling. Thanks to the pixels' near-instant response time, the Samsung S99H shows virtually no smearing. Fast-moving objects don't produce visible halos or trailing artefacts, so the TV performs very well for both sport and gaming. One quirk of OLED screens compared with LCD is the way they render low-frame-rate material. With very slow camera movement the picture can appear noticeably more juddery. This can be quite effectively mitigated using frame interpolation. Samsung lets you adjust judder reduction and motion blur reduction separately, so it's easy to find a compromise between a smoother picture and preserving the cinematic feel of the content.

For gamers the X11L is simply a superb screen. TCL has already trained us to expect that it packs practically every feature available on the market into its products, and it’s exactly the same with the flagship X series. Thanks to the new processor, the X11L gets four HDMI 2.1 ports with full 48 Gbps bandwidth. Naturally, HDMI 2.1 brings a set of very useful options, such as automatic low-latency mode (ALLM) and variable refresh rate (VRR) synchronisation, working across the full refresh range up to 288 Hz. All of these features can be conveniently controlled from the dedicated Game Bar. Interestingly, you can customise its appearance to your taste, with three ready-made themes directly referencing the Nintendo, PlayStation and Xbox consoles. And speaking of Xbox, Dolby Vision Gaming also runs without issue on the X11L.

When playing in the standard HDR10 format you should be aware of the screen’s specific brightness-curve tuning, which can cause problems during initial setup. Even though the TV supports HGiG, getting everything set correctly in the PlayStation or Xbox system menus can be tricky. The screen’s algorithms tend to artificially brighten the test checkerboard, so nailing the correct white-clip point by eye is genuinely difficult. For HDR10 to look correct, we suggest manually setting the console brightness in the console menu to around 2500–3000 nits.

Samsung S99H is also a top TV for gamers. It offers almost every possible and useful feature... well, perhaps except the obvious lack of Dolby Vision for the Xbox console. It’s equipped with four full-fledged HDMI 2.1 ports with the full 48 Gbps bandwidth. That makes it easy to use frame-rate synchronization VRR or 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 free of 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 minimap, 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 boost smoothness in games. Input lag then rises to around 40 to 50 ms (depending on the strength of the setting), which, compared with the competition, is an excellent result. The system makes gameplay noticeably smoother. So if someone has their eye on a demanding game (e.g. GTA 6 😉) that runs on a console at only 30 fps, the S99H can display it much more smoothly than competing models.