TCL C75B vs Dreame S100

During our brightness test, the TCL C75B "spat out" around 380 nits of brightness. We recorded similar results while watching most of the films we tested. These can be considered average – the TV performs decently in this segment, but around 400 nits is definitely too low to fully experience the magic of HDR effects. Of course, such results are better than those of budget models, which can achieve nearly half the brightness values. However, for HDR enthusiasts seeking stronger lighting effects and greater realism, the C75B may prove insufficient. On the plus side, it's worth mentioning the coverage of the DCI-P3 colour gamut at 95%. This is a very good result that easily suffices to enjoy a wide range of colours in content available on popular streaming platforms. Vivid and rich colours are definitely a strong point of this model.

The Dreame S100 is a relatively bright television. In movie mode, the brightness we measured reached around 600 nits. This is a really good result, although not the highest considering the competition in this price range. In full-screen scenes, it's clear that the television can generate an image that hits the mark in terms of brightness. Unfortunately, when more complex scenes appeared on the screen, the local dimming algorithm in this model tried above all to maintain the deepest blacks. However, this came at the expense of the HDR effect – and in a drastic way. In such scenes, the brightness of the bright elements fell below 100 nits, which is a downright tragic result, far from any HDR effect. This aspect can be improved, but there are caveats. You just need to change the local dimming setting in the television's menu; however, then the blacks in such scenes simply turn grey. It's a pity that Dreame wasn't able to refine the local dimming algorithms better, and the S100 is another example that the number of local dimming zones doesn't always translate into a better picture. As a consolation, it's worth noting that the Dreame S100 is marketed as a 'QLED' type television, although it actually uses a PFS LED filter. As a result, the colours are appropriately saturated, and our measured DCI-P3 colour gamut coverage exceeded 94%.

TCL C75B offers various picture modes, but in our opinion, the best choice is the “Film” mode. Although its settings are quite decent, the TV struggles with certain colour reproduction issues. In tests, we noticed that the image had a noticeably pinkish hue compared to what could be considered correct. This effect was particularly evident in skin tones, which appeared unnaturally flushed. The main culprit of this phenomenon turned out to be the white balance, characterised by an excess of blue and red in both HD and 4K HDR materials.

An additional problem was the way brightness was reproduced. The gamma, which is responsible for the visibility of details in darker materials, was definitely boosted, causing details in the darkest parts of the screen to be invisible, disappearing into complete black (e.g., the bottom part of the screen in the comparison image - the area around the actress's ear). The situation was similar on the EOTF curve, which was below the correct value, suggesting that a similar issue may be encountered in 4K HDR content.

Thanks to our experience and the appropriate tools, we decided to take matters into our own hands and check how much could be extracted from this model after professional calibration. The details are described in the next section.

We tested the Dreame S100 in "movie" mode and definitely recommend using this setting for watching all kinds of content. Interestingly, in the deeper settings of the TV, we also find a dedicated "Filmmaker" mode, which is now available from almost every manufacturer. However, in the case of the Dreame S100, we do not recommend using it – it blocks all settings related to the picture and does not allow for any configuration in the menu - not even a motion smoother. So how do the factory colours fare in the S100? Not too bad, but not great either. The TV itself had a noticeable blue tint, which is clearly evident in our white balance measurements. As a result, the picture was artificially brightened, and the colours had a slight bluish tint. This is also confirmed by the Color Checker palette, which showed how the colour samples leaned towards blue, generating quite significant colour errors. On the other hand, the picture looked definitely better in HDR mode, where the colour errors were not as prominent, although they were still far from ideal. Here, the white balance was also too heavily skewed towards blue, causing quite significant errors in color reproduction.

After calibration, TCL C75B has clearly improved when it comes to colour reproduction. Although the TV doesn't offer too many options for adjusting the white balance, we managed to improve its settings quite a bit. As a result, the image is no longer overly pink, and the colours now look much more natural and harmonious.

The gamma jump that was previously an issue hasn't completely disappeared, but we were able to significantly reduce it. This has made details in dark scenes more visible – both in HD and 4K HDR content.

Unfortunately, the lack of local dimming is still noticeable. The 'blooming black' effect remains, but that's a limitation of the display itself. Still, the colours post-calibration look significantly better, and the image is much more pleasant to watch.

The Dreame S100 has proven to be a device very amenable to professional calibration. In its menu, we found a plethora of advanced options that allowed us to effectively correct factory errors. Thanks to the advanced white balance correction – both in SDR and HDR content – we completely eliminated excess blue components. The image instantly became much more natural and pleasant to view. After fully tuning the colours, the errors in the Color Checker test dropped below a Delta E value of 2-3. For the average viewer, this means that any colour distortions became almost impossible to see with the naked eye. It's really a nice surprise, as often new brands in the TV market have significant problems with the correct implementation and functioning of sliders in the calibration menu. Here, everything worked as it should. The only thing we need to criticise is the way the TV manages its brightness in HDR. Due to the specific nature of the local dimming algorithms, our measured EOTF curve shows anomalies. In places where high highlights should appear, there is a slight bump in the curve above the reference line. In practice, this results in unnatural brightening of certain, the brightest elements in movies or games. Despite this minor flaw, professional calibration brings a huge, very positive change to this model.

TCL C75B has a feature for smoothing tonal transitions, but unfortunately, we cannot praise it. Regardless of the selected level – low or high – tonal transitions in older materials remained visible, as if the feature wasn’t working at all. It’s hard to say anything positive about it, as in practice it seems completely useless.

Image scaling is better. The TV handles it quite decently, although on thinner elements, like branches in the background, you can see slight jaggedness. However, this is not something that significantly hinders everyday viewing.

Unfortunately, a bigger problem turned out to be overscan, or cropping of the image edges. In our tests, it happened that news ticker or other elements close to the edge of the screen were cut off. This is definitely something to pay attention to, especially if we use the TV for watching news programs or content with text on the screen.

For scaling and digital processing in the Dreame S100, the technology used is proudly called Dreamind™ Pro AI by the manufacturer. However, it must be clearly stated that this is not a proprietary processor but rather a marketing term for a chip from MediaTek – specifically, the model MT5889. Unfortunately, we are talking about a rather outdated unit from a time when MediaTek lagged significantly behind the competition in terms of performance. This, unfortunately, has a direct impact on the image, as this chip also handles that. The upscaling in the S100 is fairly average, and the processor has a tendency to artificially over-sharpen edges (fortunately, this can be somewhat tempered with the sharpness slider in the menu). In the options, we also find a feature called "Contour Smoothing," which theoretically is supposed to improve tonal transitions. In practice, it contributes almost no improvement – setting it to any level rarely eliminates visible colour banding, but it can unnecessarily blur elements of the image that should remain sharp.

Another issue is the phenomenon of overscan (cropping the edges of the frame), which is practically visible all the time. Although there is the possibility to set the screen to display the full frame in low-resolution materials, it requires activating the aforementioned Filmmaker mode. And as you may know, this mode completely blocks any changes to other sliders in the picture menu. In our test tables, we noted that the television offers an option to disable overscan, as such a function technically exists in the system – however, in everyday use, while maintaining reasonable picture settings, you will not be able to take advantage of it.

TCL C75B definitely has something to offer gamers. The television is equipped with a panel that can display images with a refresh rate of 144 Hz in 4K, and even 240 Hz in Full HD. These are really impressive results, especially for a model from the budget range.

On top of that, there are features for improving smoothness and reducing motion blur in films. The "Motion" option allows for precise adjustment of the effect on a 10-point scale, providing significant personalisation possibilities – everyone can set the smoothness to their liking.

When it comes to motion fluidity, the Dreame S100 performs really well. It features a 144 Hz refresh rate panel, although in reality, the vast majority of people using it in a conventional way will still be limited to 120 Hz (as this is what today's hardware allows aside from PCs). Thanks to the high refresh rate, the image in motion remains really sharp, largely due to the well-functioning MEMC motion smoother. In the menu, we find predefined modes that enable the TV to efficiently generate artificial frames, which effectively enhances the fluidity of dynamic sports shots, but also helps eliminate motion judder in film and TV series material recorded at 24 frames.

TCL C75B is undoubtedly a television designed with gamers in mind. It has almost everything needed for even the most demanding console users. With the implementation of full bandwidth HDMI 2.1, the TV supports features like ALLM (automatic low latency mode) and VRR (variable refresh rate) – operating within the full capabilities of the TV, up to 240 Hz in Full HD resolution.

Additionally, the television supports advanced HDR technologies, including Dolby Vision and HGiG, which allows for even better detailing in HDR-optimised games. C75B is also equipped with a very convenient interface for gamers in the form of Game Bar, where you can check all key parameters such as refresh rate, input lag, or picture settings – all just a click away.

In one sentence: C75B is a great choice for gamers, offering a wide range of features that fully enable enjoyment of the capabilities of modern consoles and games.

The Dreame S100 seems almost like the ideal screen for gamers. The television is equipped with 2 HDMI 2.1 ports with a bandwidth of 40 Gbps, allowing features such as automatic game mode (ALLM) or VRR frame synchronization in the range of 48-144 Hz to work seamlessly on consoles. On board, we also find a well-designed gaming panel (Game Bar). It allows you to continuously preview the most important parameters - from the activated picture modes, to the number of frames rendered by the console, right through to the option of adding a crosshair in the centre of the screen. All of this looks great on paper; however, the biggest issue with the S100 is its implementation of HDR in games. The television does not have a correctly implemented HGiG format. This means a clueless user may misconfigure the console during the initial setup of the screen. Poor configuration can result in an image that is too dark or overexposed (as a guideline: we suggest setting the brightness in the Xbox console menu to around 600 nits, and in the PS5 to 12 clicks). The Dolby Vision format also proves problematic, as it often did not activate at all on the XBOX – Dreame S100 line. And when it was eventually activated, playing was impossible due to the very high input lag often exceeding 100ms. If the manufacturer manages to improve the HDR gaming experience with an update, the S100 will be truly outstanding hardware for gamers. For now, however, compromises must be accepted.