Sharp GR8 vs TCL C75B

Sharp GR8 in its promotional materials boasts of "very high brightness" at a level of 500 nits. Unfortunately, our tests showed that reality is somewhat different – the average luminance we were able 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 a bit sharper than in standard SDR, but it's hard to talk about true vibrancy and depth of bright elements here. However, the coverage of the DCI-P3 colour palette at 95% deserves praise. This is the result of applying an additional PFS coating, known from QLED technology. As a result, colours are vibrant and have a pleasant, natural tone, which partially compensates for the shortcomings in brightness.

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.

At the beginning, it's worth noting that colour reproduction tests are always conducted in the best factory picture mode. In the case of Sharp GR8, this is the “Film” mode. When it comes to white balance, which affects how we perceive colours 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 appear to have a pink tint, which we can see in the comparative photo from the film STAR WARS. During the Color Checker test, it was clearly visible how the colour samples deviated from the standard values, confirming significant errors in colour reproduction. The gamma was also not ideal – it caused excessive brightening of the entire image, causing the scene to lose depth and proper tonal transitions.

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

To summarise, the “Film” mode in Sharp GR8 would require some adjustments in order to fully utilise the potential of this television. Fortunately, we took care of this and proceeded with calibration.

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.

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 this model's price segment. The picture becomes significantly closer to what the director intended to show – colours appear natural, and skin tones gain the right depth and warmth. The brightness characteristics also leave a very positive impression. Both the gamma and the EOTF curve demonstrate really solid values. While slight imperfections can be noticed, they are subtle enough that it's difficult to see them during everyday viewing. In summary, calibration allows Sharp GR8 to show its best face, offering a picture that is not only pleasant to the eye but also faithfully conveys the creators' intentions.

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.

Sharp GR8 is equipped with a feature called "10-bit colour reproduction," 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 feature surprisingly smooths out things it shouldn’t - walls, shirts, or other flat surfaces look almost as if they have been ironed. In the test, we had to note that there is simply no actual impact on tonal transitions.

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

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.

This is where Sharp GR8 has the opportunity to stand out against the competition in its price segment. The television 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 films, sports broadcasts, or video games. Additionally, the manufacturer has included a motion smoothing feature, commonly known as a 'smoother'. The user has three levels of adjustment available, allowing them to tailor the effect to their personal preferences – from subtle smoothing to a more aggressive intervention in the fluidity of the image. It's a nice addition, particularly for those who mainly watch films and care about smooth, cinematic sequences without annoying judders or stuttering.

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.

If the television has a 144 Hz panel and two full HDMI 2.1 ports, it’s clear it was designed with gamers in mind. The Sharp GR8 offers exactly that – high refresh rates and the right connections to get the most out of modern consoles and PCs. It also features ALLM, which automatically switches the TV to low latency mode, and VRR, ensuring the picture doesn’t stutter even in more demanding moments. In practice, everything works as it should, and it's difficult to find fault. However, it’s not without its shortcomings. There’s a lack of support for HGiG, which better adjusts HDR for games, as well as Game Bar, which makes it easier to quickly adjust settings without leaving the game. Despite these drawbacks, the Sharp GR8 is a really solid option for gamers.

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.