Panasonic W85 vs TCL C8L / QM8L

Unfortunately, we don't have good news here. The Panasonic W85B is rather dim – its peak brightness does not exceed 300 nits, so it's hard to talk about any true HDR effect. In practice, this means that scenes which on other screens can "shine" and make an impression, here look simply like regular SDR with a slight boost in colors. Our measurements and film tests confirmed this – regardless of the content, the W85B won't extract anything more from HDR. So if someone is looking for a TV specifically for HDR, it's better to look towards other models. As a consolation, the fact remains that in terms of colors, the W85B performs quite well. It's a QLED TV, so its color gamut coverage is wide, and most films and series look natural, without a distinct "washed out" effect. The colors are saturated, so during regular viewing, there is no sense that something is quite wrong.

In terms of HDR, the TCL C8L turns out to be a hellishly bright television – and I mean literally. On a synthetic chart of 5%, our measuring equipment indicated a result exceeding 4500 nits. This is a result that is downright cosmic, considering that reference director monitors, which we often refer to in our materials, typically operate around 4000 nits. Does this mean that the C8L breaks barriers and climbs to the technological peak of Mini-LED? Not exactly. Dry synthetic tests are one thing, and real movie images are another. In real, varied scenes, the C8L achieves a peak of around 1600 nits. This is still a very good result, ensuring a very high level of HDR dynamics, but also clearly lower than what the manufacturer boasts in the specifications. The trouble starts with very small flashes of light – then brightness can drastically drop to around 600 nits. The algorithm tries at all costs to maintain deep black and minimize halo effect, but it does so at the expense of HDR impact. This is perfect evidence that laboratory charts rarely correspond to what we ultimately see on the screen.

Huge applause is due for color reproduction, all thanks to the new generation of SQD (Super Quantum Dot) quantum dots. The coverage of the DCI-P3 palette reaches 97%, but the true jaw-dropper is the measurement of the extremely demanding BT.2020 space. The C8L achieves as much as 90% in it, placing it alongside today's top screens that boast RGB backlighting. Importantly, unlike some screens with Micro/Mini RGB backlighting, this effect is stable regardless of the scene displayed. Of course, one must remember that content mastered for such a wide gamut in films or series is still a rarity. However, the mere fact that the panel has such a "color reserve" deserves immense admiration.

While testing the Panasonic W85B, we of course started with the Filmmaker mode, as it is the gold standard today for watching content "as the director intended." The problem is that this TV is quite far from those intentions. The biggest issue turned out to be an excess of red – in both SDR and HDR. The picture often looked overly warm, and in some scenes, it appeared almost "blazing." Additionally, there’s the issue of brightness management. When we looked at the gamma and EOTF charts, it was clear as day that in most scenes, the TV brightens the image more than it should. The effect was easy to predict. Details can get lost, leading to flattening and clipping across the entire screen. Of course, we know how to improve this, but it must be said honestly that it requires quite a bit of work in calibration. Out of the box, the W85B does not provide a reference-level picture – it is rather a TV that will always interpret colors and brightness a bit "its own way" without professional adjustments. Unfortunately, this is to the detriment of the viewer.

We tested the TCL C8L in the best factory picture mode available in this TV’s menu for image fidelity. That, of course, is Filmmaker Mode, which appeared in this brand’s software relatively recently (a year ago in the "K" series). Thanks to it, an average user can get a pretty good color reproduction straight out of the box, although it is certainly not a perfectly tuned mode. Looking at the factory white balance of our unit, both in SDR and HDR material, the red component was clearly lacking, which made the image noticeably cooler and caused a slight shift toward bluish-green tints. The issue of brightness management is also ambiguous, as we mentioned earlier. While for SDR content the gamma linearity is actually correct and holds steadily at the reference value of 2.4, in HDR things look much worse. Tracking the EOTF curve clearly shows the TV has a significantly boosted brightness across the range, which can make the final image overly bright and inconsistent with the creators’ intent, and that in a mode that by definition should avoid that. Of course, like every sample in our lab, this one also underwent professional calibration, and its results are shown below.

Fortunately, calibration made a significant difference for the Panasonic W85B, especially in SDR content. Here, the improvement was really noticeable – we managed to balance the white and reasonably tame the TV's tendency to excessively brighten the entire image. The picture became more coherent, and the colors gained a naturalness that was lacking in the factory settings. Admittedly, the results from the Color Checker are not perfect, as the W85B has visible issues with green saturation, but overall, we assess the post-calibration effect in SDR very positively. The situation with HDR is a bit different. Here, we were also able to limit the tendency to warm up the entire scene, so the image turned out much better than in the factory settings. However, the same problem we mentioned earlier is still evident – the TV interprets the image too "in its own way" and brightens the entire frame. The lack of local dimming only exacerbates this effect. In summary, briefly in SDR content, the W85B performs really well after calibration and is perfectly suitable for everyday viewing. However, in HDR, even after adjustments, it is still hard to unequivocally recommend it for serious viewing sessions.

As you can see, the results of a professional calibration of the TCL C8L are really promising, thanks to the extensive adjustment tools the manufacturer put at our disposal in the menu. Above all, we were able to completely correct the white balance — we eliminated the red deficiency, so the image finally stopped drifting toward unwanted cool tones. After that adjustment, errors in the ColorChecker test fell to near-reference levels, regularly landing below a Delta E of 2, which is below the threshold of human perception.

If the test patterns look this perfect, you might ask: why then the lower final score in this category? The answer lies in the brightness management discussed earlier. Although the menu includes sliders that let you precisely straighten the EOTF curve on synthetic signals, when confronted with actual movie material (I recommend enabling the EOTF filter when watching movies), you can see that in most scenarios the TV still reacts to HDR metadata its own way. As a result, the picture can be slightly over-brightened and not faithful to the creators' intent, and it was precisely this lack of consistency with real films that cost the C8L a few points.

With native SDR content, the Panasonic W85B performs very well – tonal transitions are smooth and natural, without artificial bands or clear contours. However, the situation looks worse with lower resolution materials. This is where the television has the biggest problem with "beautifying" the image. The lack of any option in the menu that would allow for improving gradation means that with older films or materials from YouTube, one can sometimes notice slight issues with color blending.

Fortunately, upscaling, or increasing the quality of lower resolution content, performs much better. This is definitely a strong point of this model – the image is scaled cleanly and in detail, and the television handles this better than one might expect from such an affordable device. This is thanks to the HCX processor, which Panasonic has been developing for years, and it shows that even in the lower series, it can do a good job.

This year the C8 series and higher models received probably the biggest and most anticipated upgrade in TCL’s history, and it specifically concerns digital image processing. The C8L is the lowest-end model in the manufacturer's lineup to be equipped with the latest flagship chip, the MediaTek Pentonic 800 (listed in the menu as MT9655). Thanks to its processing power, the feature called "Gradual Smoothing" finally works as it should. The algorithm effectively eliminates unwanted posterization (ugly tonal transitions/color banding), doing so intelligently enough that it does not degrade the sharpness of other details.

The processor also handles upscaling lower-resolution content to 4K very well. Although evaluating this element can be mostly academic, because the differences between today's TVs in this class are very subtle. The most important takeaway is that TCL finally has nothing to be ashamed of compared to the competition.

At first glance, everything looks good – the Panasonic W85B has a 120 Hz panel and even a 144 Hz mode, so it seems that it should handle smooth motion well. The problem begins when we look into the settings. The options for improving fluidity are supposedly present in the menu, but in practice… they change nothing. No matter what we choose, the image looks the same. On top of that, there's a lack of BFI, which is the black frame insertion mode that helps sharpen motion in many TVs. And suddenly, it turns out that despite having a strong panel, the W85B doesn't give us any real tools to adjust that motion to our needs. It only works well when the source itself operates at a higher frequency – for example, games at 120 Hz. But when it comes to movies or sports, we just have to take what the TV shows us, because there's nothing more we can do about it.

The TCL C8L is equipped with a fast panel that has a native 144 Hz refresh rate. That spec will be most appreciated by demanding PC gamers, while most users, who rely on consoles or TV broadcasts, will use a steady 120 Hz. It is at 120 Hz that motion processing algorithms handle image rendering for movies, series, and sports. In the TV’s menu you’ll find a "Motion Clarity" option that lets you adjust the motion smoothing to your preferences. The algorithms handle cinematic material at 24 or 30 frames per second (fps) as well as dynamic sports broadcasts at 50 or 60 fps, maintaining appropriate smoothness.

On paper, the Panasonic W85B looks really solid. Here we have two full HDMI 2.1 ports, support for ALLM, variable refresh rate, Dolby Vision in games, and of course, a high refresh rate for the panel itself. Additionally, there’s the characteristic Panasonic game bar that allows you to check key parameters with one click and quickly change them if necessary. Sounds great, but the problem arises when we activate HDR. Here, the W85B significantly falters because it lacks proper HGiG implementation – the TV manages brightness poorly, and instead of faithful image rendering, we get scenes that are too bright, sometimes even blown out. The solution? The simplest – turn off HDR in the console settings and leave everything in SDR. And here it gets really interesting, because in this scenario, the W85B shows its better side. Low input lag, high smoothness thanks to 120 Hz – all of this makes gaming look phenomenal. Yes, HDR can be sacrificed, but if responsiveness and smooth gameplay are priorities, the W85B provides a lot of fun.

For gamers – especially for those with powerful PCs and several consoles at the same time – the TCL C8L is a true beast. It’s the first model in the manufacturer’s lineup equipped with four full HDMI 2.1 ports with a maximum bandwidth of 48 Gbps. This is directly thanks to the new Pentonic 800 processor we wrote about earlier. Additionally, the TV seamlessly supports virtually every gaming feature. It has an automatic game mode (ALLM) that reduces latency to minimal levels and full frame synchronization (VRR) operating in an impressive range of up to 288 Hz. We’re also talking about standards like G-Sync or FreeSync from Nvidia and AMD. When it comes to image display standards, there are also no compromises: the C8L offers complete support for HDR formats in games, including gaming Dolby Vision and the HGiG profile. All of these features can be conveniently managed from a very readable game bar (Game Bar), which we can customize according to our preferences. From a purely gaming perspective, there really isn’t anything to complain about in the C8L – well, maybe aside from the previously mentioned slight ghosting. But other than that? It’s an unflawed machine for gamers.