LG QNED87T6B vs TCL C6KS / C69KS / Q6CS

LG QNED87T6B delivers truly decent visual experiences when it comes to HDR. During our tests on test patterns, the television achieved brightness close to 500 nits, which is a satisfactory result and allows for good visibility of details in high dynamic range scenes. Support for basic HDR formats such as HDR10 and HLG ensures proper image quality. Unfortunately, the television does not support more advanced standards such as Dolby Vision or HDR10+, which are particularly important at this screen brightness. The lack of support for dynamic metadata means that in certain scenes, the television may struggle to fully reproduce details, especially in very bright areas – this is precisely when dynamic metadata could significantly improve image quality. Nevertheless, it is worth noting the excellent coverage of the wide DCI-P3 colour gamut, reaching as much as 96.4%. As a result, the colours displayed by the QNED87T6B model are more vivid and natural, enhancing the quality of 4K content viewed with a wide colour palette.

And what about HDR? Here the C6KS performs quite well and – as is becoming the theme of this review – just like in the C6K model. The maximum brightness generated by this television is around 600 nits. In bright scenes, this translates to a really solid, cinematic effect and generally, video materials look good here. However, it's important to keep in mind the specifics of the dimming algorithm in this model. When very small, bright points (e.g. stars) appear on a dark background, the television can quite significantly dim them. The goal is simple: to eliminate blooming and maintain the best possible black. It's a reasonable compromise. Most viewers will definitely appreciate deep, “true black” more than additional microscopic details, the display of which could cause the screen to appear greyed out. Such is the nature of local dimming technology in this price range, and one must be aware of this. It’s also worth noting that the TCL C69KS (C6KS) has an additional PFS coating, which is marketed under the QLED technology slogan. Thanks to this, the colours are saturated and vibrant – our measurements showed that the coverage of a wide colour gamut reaches as much as 92%.

The colour accuracy in the LG QNED, even in Filmmaker Mode, which is the best factory setting, is not without its flaws. The main issue is white balance – we noticed that the level of blue on the graph tends to drop. This results in a shift in colours towards yellow, making the image have a warmer tone than it should. This deviation affects the naturalness of colour reproduction, especially in scenes with a white or neutral background. The Color Checker test confirmed that some colours are distorted and deviate from reality. Such distortion can make film scenes appear less realistic, and details are presented in incorrect colours, negatively impacting the overall image quality.

Regarding contrast, the gamma graph analysis showed significant drops, while the optimal value should be 2.4. This means that the television may display darker parts of the image brighter in some scenes, which reduces their depth and dynamics. Additionally, on the EOTF curve, which is responsible for brightness reproduction, an unnatural drop was noted at the beginning. This phenomenon can result in less accuracy in reproducing dark scenes, which in turn affects the overall image quality. The television may not convey full black depth, causing more demanding scenes to lose realism and detail. As a result, viewers may notice that details in the darker parts of the image become less distinct.

In contrast to the more expensive C6K model, in the tested C6KS we don't find an option in the menu labelled as Filmmaker Mode. Is this a reason to cry? Absolutely not. Our tests showed that in practice, in terms of colour reproduction, the lack of this specific label makes virtually no difference. The best available Film/Cinema mode here offers an almost identical picture profile to the aforementioned Filmmaker in the more expensive model. So we get a very similar image, just under a different name. Therefore, if you were wondering whether paying extra for the C6K would give you better colours – the answer is: no, in both cases the base is the same and requires slight adjustments.

After calibration, the colours in SDR content look very good. The improved white balance translates to natural and harmonious shades in various scenes. Thanks to precise gamma tuning, details in shadows and bright areas of the image are accurately reproduced. The television performs excellently in everyday use, offering vibrant, well-balanced images and solid colour quality in HD. The biggest beneficiary here is also contrast. The gamma graph has been stripped of significant errors, giving the television a new dimension.

As for the white balance in 4K HDR, it has also been significantly improved. However, some errors still appear at the end of the graph. This may be due to the television's overly aggressive local dimming, which in some scenes affects the inaccurate reproduction of colours. It's difficult to talk about an improvement in brightness represented by the EOTF curve. The television, due to its construction limitations, has some drawbacks, and we can't overlook them. The Color Checker test confirms the issue with colour saturation – even though the television offers a wide colour palette, it fails to fully convey the director's intent.

Despite these shortcomings, the overall picture quality after calibration is significantly better than before. Adjustments in white balance and gamma tuning make the images more vivid and the colours closer to reality.

Thanks to the white balance adjustment, the C69KS's tendency to distort colours has been effectively limited, leading to a very good final effect. After calibration, we will no longer see excessive warmth in SDR scenes or overly cool tones in HDR. However, it is worth noting the brightness characteristic. In SDR content, there are hardly any objections – the image looks very good, especially in older films, TV shows, or YouTube materials. Evaluating the television's performance in HDR is much more difficult. Analysis of the EOTF curve suggests correct behaviour, but its practical variant shows certain limitations. The C69KS can overly brighten the smallest elements of the frame, while at other times it can dim the entire scene. Calibration has therefore brought clear benefits in terms of colour, but certain limitations resulting from local dimming and the way it is controlled by the C69KS cannot be avoided, which we also observed in the C6K test.

When it comes to lower quality materials, the gradation looks really good. The feature called "Smooth Gradation" effectively smooths out the most problematic parts of the image, while not negatively affecting the film grain. For the best effect, it’s worth setting it to a low level. This solution significantly improves the quality of the displayed content, making the viewing of lower resolution materials more enjoyable and smoother.

In terms of digital processing, the image is displayed without cropping, known as overscan. Although slight fraying of the branches can be noticed against the model's background, everything looks very good. Users should be satisfied with the image quality when watching low-quality materials like standard television. The TV handles this task exceptionally well, providing a satisfying visual experience, even with lower quality content.

The C69KS handles upscaling quite well. The tested 576p content looks surprisingly decent – a considerable amount of detail is preserved, and the algorithm adds a subtle ‘rounding’ effect to sharp edges, making the image appear more cohesive. However, it doesn't perform as well when it comes to smoothing tonal transitions. The television practically cannot improve them, leaving the image in a rather raw state. With older materials, this can be simply exhausting, as the lack of additional processing highlights all imperfections.

The television provides decent smoothness when watching movies, thanks to the “Tru Motion” feature, which allows adjustment of motion smoothing from 0 to 10. De-Judder regulates motion smoothness, while De-Blur adjusts motion sharpness. Users have the option to choose between a traditional cinematic effect with subtle juddering motion (lower settings) and a smoother, theatrical image. Although the latter deviates slightly from the cinematic standard, it may be appealing to many viewers.

As for gamers and sports fans, the LG QNED87 television with a 120Hz panel will surely not disappoint. And with the use of an IPS panel, the response time is typically better than that of VA panels available at a similar price. This ensures smoother gameplay and dynamic experiences when watching sports events.

C69KS offers a simplified motion enhancement panel in movies, allowing users to adjust the intensity of the effect using a slider. This makes it easy to tailor the smoothness to personal preferences. It also deserves credit for the ability to utilise higher refresh rates – even though the panel operates natively in 4K at 60 Hz, by lowering the resolution to 1440p, modes of 120 and 144 Hz can be enabled, on both consoles and PC. This sounds like great news, however, in practice, the image at these settings trails exceptionally badly. The effect is so pronounced that the overall experience simply appears mediocre and loses its appeal in everyday use.

LG QNED offers a range of features that make it an excellent choice for gamers looking for a high-performance television. The TV is equipped with four HDMI 2.1 ports, allowing connection to the latest consoles like PlayStation 5 and Xbox Series X, utilising full functionality including Variable Refresh Rate (VRR) and Auto Low Latency Mode (ALLM). Thanks to the Game Bar feature, gamers can quickly and easily manage all game settings without needing to navigate complex menus. Parameters such as VRR, ALLM, Multi View, and frame rate monitoring can be adjusted. The TV also supports G-Sync and FreeSync technologies, which is particularly important for owners of Nvidia and AMD graphics cards. G-Sync and FreeSync synchronise the TV's refresh rate with the graphics card. The 120Hz panel guarantees incredible motion smoothness and image clarity. Combined with the Black Frame Insertion (BFI) feature, which is available at 60Hz and 120Hz, gamers can enjoy an even sharper and smoother picture. LG QNED87 is a television that meets the expectations of even the most demanding gamers, offering modern technologies and features that significantly enhance comfort and satisfaction during gaming.

If we overlook the smudging and lack of native 4K at 120 Hz, the C69KS is impressive in how well it performs for gaming. You get everything you would expect from a gaming TV: Variable Refresh Rate (VRR), Auto Low Latency Mode (ALLM), Dolby Vision Gaming mode, and a consistently functioning HGiG. The TV can also operate at 120 or even 144 Hz at lower resolutions, making gameplay on console or PC smoother. Additionally, there's a clear Game Bar that allows you to quickly check key settings while gaming. As a result — despite a few limitations — the C69KS can be a genuinely successful screen for gamers.