Sharp GR8 vs TCL C75B

Sharp GR8 boasts "very high brightness" at a level of 500 nits in its promotional materials. Unfortunately, our tests showed that the reality is somewhat different – the average luminance value we managed to achieve was around 360 nits. This is rather an average result, especially in the context of the manufacturer's claims. Such brightness does not allow for a full enjoyment of HDR effects. The image is somewhat sharper than in standard SDR, but it is difficult to speak of true juiciness and depth in bright elements. However, the coverage of the DCI-P3 color palette at 95% deserves praise. This is the result of applying an additional PFS coating, known from QLED technology. As a result, colors are vivid and have a pleasant, natural tint, which partially compensates for the deficiencies in brightness.

During our luminance test, the TCL C75B "spat out" about 380 nits of brightness. We recorded similar results while watching most of the films we tested. These can be considered average – the television does not perform badly 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 as low brightness values. However, for HDR enthusiasts seeking stronger light effects and greater realism, the C75B may prove insufficient. On the plus side, it's worth mentioning the 95% coverage of the DCI-P3 color palette. This is a very good result that easily suffices to enjoy a wide range of colors in content available on popular streaming platforms. Vivid and rich colors are definitely a strong point of this model.

At the outset, it is worth noting that color reproduction tests are always conducted in the best factory picture mode. In the case of the Sharp GR8, this is the "Film" mode. As for the white balance, which is a characteristic that affects how we perceive colors on the screen, in SDR mode, the strong dominance of blue immediately stands out. This results in an unnatural cooling of the image—blue elements take on a purple hue, and skin tones acquire a pink glow, which we can see in the comparative photo from the movie STAR WARS. During the Color Checker test, it was clearly visible how the color samples deviated from the reference values, confirming significant errors in color reproduction. Gamma was not perfect either—it caused excessive brightening of the entire image, causing the scene to lose depth and proper tonal transitions.

In 4K HDR mode, the situation looks much better. The dominance of blue is much less noticeable, although there are minor issues with the combination of red and blue. This makes some shades look somewhat unnatural. The EOTF curve, responsible for the brightness of the image in 4K HDR content, showed another problem—the television tends to excessively darken the image across the entire screen.

In summary, the "Film" mode on the Sharp GR8 would require some adjustments to fully utilize the potential of this television. Fortunately, we addressed this and proceeded to calibration.

TCL C75B offers many picture modes, but in our opinion, the best choice is the "Film" mode. Although its settings are quite good, the television struggles with certain color reproduction issues. In tests, we noticed that the image had a noticeably pinkish tint compared to what could be considered correct. This effect was particularly noticeable in skin tones, which appeared unnaturally warm. The main culprit of this phenomenon turned out to be the white balance, characterized by an excessive amount of blue and red in both HD and 4K HDR materials.

Another issue 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, lost in total blackness (e.g., the bottom part of the screen in the comparative photo - the area around the actress's ear). Similarly, the situation was reflected in the EOTF curve, which was below the correct value, suggesting that a similar problem 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 see how much could be extracted from this model after professional calibration. Details are described in the next section.

Sharp GR8 is one of those televisions that really gains a second life after proper calibration. Both in HD and 4K content, the white balance performs very well, especially considering the price segment of this model. The image becomes much closer to what the director wanted to show – colors look natural, and skin tones acquire the appropriate depth and warmth. The brightness characteristics also leave a very positive impression. Both gamma and the EOTF curve show really solid values. Although minor imperfections can be noticed, they are subtle enough that it's hard to see them during everyday viewing. In summary, calibration makes the Sharp GR8 show its best side, offering an image that is not only pleasant to the eye but also faithfully conveys the creators' intentions.

After calibrating the TCL C75B, it has clearly improved in terms of color reproduction. Although the TV does not offer many options for adjusting the white balance, we were able to refine its settings significantly. As a result, the image has stopped being overly pink, and the colors now look much more natural and harmonious.

The gamma jump, which was previously a problem, has not disappeared completely, but we managed to significantly reduce it. This has made the details in dark scenes more visible – both in HD and 4K HDR material.

Unfortunately, the lack of local dimming is still noticeable. The "glowing black" effect remains, but that's a limitation of the display itself. Despite this, the colors after calibration look vastly better, and the image is much more enjoyable to watch.

The Sharp GR8 is equipped with the "10-bit color reproduction" feature, which theoretically should improve the smoothness of tonal transitions. In practice... well, the effect is surprising, but not in a very positive way. Even at the highest settings, it's hard to notice any impact on the actual tonal transitions. Instead, the function surprisingly smooths out things it shouldn't – walls, shirts, or other flat surfaces look almost like they have been steam-pressed. In the test, we had to note that there is simply no actual impact on tonal transitions.

When it comes to image scaling, the Sharp GR8 performs significantly better here. The television is capable of giving the image a plastic, smooth characteristic, making even lower resolution content look quite good. Of course, with more demanding details, such as thin tree branches in the background, you can see slight jaggedness, but this is not something that would significantly affect viewing comfort.

The TCL C75B has a tonal transition smoothing feature, but unfortunately, we can't praise it. Regardless of the selected level – low or high – tonal transitions in older materials remained visible, as if the feature didn't work at all. It's hard to say something positive about it because, in practice, it seems completely useless.

The image scaling is better. The TV performs quite decently, although on thinner elements, like branches in the background, you can notice slight halos. However, this is not something that significantly interferes with daily viewing.

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

This is where the Sharp GR8 has the chance to stand out against the competition in its price segment. The TV is equipped with a 144 Hz refresh rate panel, which is an impressive result, especially if we plan to use it for dynamic content such as action movies, sports broadcasts, or video games. Additionally, the manufacturer has included a motion smoothing feature, commonly referred to as a "smoothener." The user has three levels of adjustment available, allowing them to tailor the effect to their own preferences – from subtle smoothing to more aggressive intervention in motion fluidity. This is a nice addition, especially for those who mainly watch movies and value smooth, cinematic sequences without annoying stuttering or frame drops.

TCL C75B definitely has something to offer gamers. The TV 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 great results, especially for a model from the budget range.

Additionally, 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-step scale, providing a lot of customization options – everyone can set the smoothness to their liking.

If a television has a 144 Hz display and two full HDMI 2.1 ports, it is clear that it has been designed with gamers in mind. The Sharp GR8 offers exactly that – high refresh rates and the right connections to maximize the performance of modern consoles and PCs. It also features ALLM, which automatically switches the television to low-latency mode, and VRR, which prevents screen tearing even in more demanding moments. In practice, everything works as it should, and it is hard to find any faults. However, there are some shortcomings. It lacks support for HGiG, which is a feature that better adjusts HDR for games, as well as a Game Bar that makes it easier to quickly adjust settings without leaving the game. Despite these downsides, the Sharp GR8 is a really solid option for gamers.

The TCL C75B is undoubtedly a television designed for gamers. It offers almost everything that the most demanding console users need. With the implementation of full-bandwidth HDMI 2.1, the television supports features such as ALLM (automatic low latency mode) and VRR (variable refresh rate) – operating across 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 detail representation in HDR-optimized games. The C75B is also equipped with a very convenient interface for gamers in the form of a Game Bar, where you can check all key parameters, such as refresh rate, input lag, or picture settings – all within one click's reach.

In a nutshell: the C75B is an excellent choice for gamers, offering a wide range of features that allow for fully enjoying the capabilities of modern consoles and games.