LG OLED C4 vs Hisense UR8S

The HDR performance of the LG OLED C4 is impressive, firmly placing it in the higher tier. Most films exceed 700 nits, delivering a highly realistic image. While none surpass the 1,000-nit mark, the combination of these results with the TV’s infinite contrast and perfect blacks significantly enhances the visual experience. The final scene, with a full-screen flash of sunlight, is slightly less bright than the others but still maintains a solid level of brightness. Another highlight is the excellent DCI-P3 colour gamut coverage, which ensures incredibly vibrant colours. The HDR technology in the LG OLED C4 delivers exceptional colour and detail reproduction. The dynamic tone mapping feature optimises brightness levels, ensuring ideal light reproduction in every scene, even in the most demanding high-dynamic films.

UR8S is a slightly higher-end Mini-LED, so you could expect a lot in terms of brightness. And indeed, on a synthetic test pattern the peak brightness reached around 2200 nits. That's a very good result, but as always what matters more is what the TV does in normal film scenes. Here the results are a bit more uneven. In bright scenes with a lot of light on screen, the UR8S can deliver really strong HDR. Brightness then reaches about 1500 nits, so the image is very intense and has a lot of punch. It's worse with small bright elements on a dark background. The TV noticeably dims them to maintain good blacks and avoid excessive blooming. As a result, things like single stars or tiny specular highlights can be only around 200 nits. And here HDR is no longer as impressive. So the local dimming algorithm works effectively, but it comes at a cost, sometimes it simply sacrifices the brightness of small details too much in favor of contrast.

Colors

With RGB Mini-LED TVs, colors should be evaluated a bit differently than usual. If we look solely at the panel's capabilities, the UR8S performs great. We measured about 94% coverage of BT.2020 and practically full DCI-P3. These are among the highest values currently found in LCD TVs, and this is where the potential of RGB backlighting is most apparent. The problem is that this potential isn't always used in real scenes. When we ran the same measurements on patterns with an overlaid film background, the saturation of some colors dropped noticeably. Individual zones can't always control the three RGB components as precisely when the scene becomes more complex. This is most noticeable with blue and magenta. In simple test patterns they can look very strong, but in tougher scenes samples of those colors clearly shrink. So the UR8S has enormous potential, but the TV can't always make full use of it.

The best factory mode on the tested television was "Filmmaker," which served as the basis for all evaluations. In terms of colour reproduction, this mode performed reasonably well; however, certain flaws significantly detracted from the overall viewing experience. The most fundamental issue was the white balance, which exhibited a noticeable dominance of red, skewing the image characteristics. This resulted in a pronounced yellow tint to whites and a general shift of all colours towards warmer tones.

The gamma, an equally crucial—if not more important—aspect, was notably lowered, leading to a marked reduction in contrast. Additionally, the television frequently lost detail at the start of the gamma curve. These issues were most apparent in SDR content.

When examining HDR materials, the same yellowing effect in the white balance was observed, as seen with SDR content. However, the EOTF curve, which replaces the gamma curve for HDR, was near perfect and left little room for criticism.

For evaluating out-of-the-box colors we used Filmmaker mode, which is supposed to show the image as close as possible to how the material was intended. Looking at white balance alone, the UR8S does quite well. There is no strong color cast that immediately jumps out, although as brightness increases a bit too much blue and red appear while green becomes deficient. Color errors therefore show up in measurements, but the image itself does not look bad.

We have far bigger reservations about how the UR8S manages image brightness. In SDR the gamma stays around 1.9 to 2.0 for most of the range instead of the target 2.4. In practice this simply means the image is too bright, especially in the midtones. Shadows are lifted too much, so the image loses some depth. A similar trend is visible in HDR. The EOTF curve sits above the reference value for a large portion of the range, so the UR8S again brightens the image more than it should. This is not a matter of the TV lacking brightness; it has plenty of it. The issue is how it manages that brightness. As a result, HDR material can look very striking, but not always exactly as it should.

As mentioned, LG televisions come with advanced tools to facilitate an accurate calibration process. By utilising these tools, we meticulously adjusted the image to align with the director’s original vision. Without overstating, the results were outstanding. Both SDR and HDR content now achieve a level of visual fidelity that reflects how films are intended to be seen.

Examining the colour accuracy on the "ColourChecker" palette reveals impressive results, with almost all colour errors falling below a delta of "1," aside from two minor exceptions. Post-calibration, the LG OLED C4 demonstrated a marked improvement in colour reproduction, particularly in SDR and HDR modes. Testing the TV after calibration highlighted its capacity for delivering exceptionally accurate colours, underlining the high calibre of this model. The LG C41LA offers a stunningly precise colour palette, sure to satisfy even the most discerning viewers.

Hisense offers quite a few calibration options, and in SDR you can achieve a really good result with them. After calibration, the white balance is practically uniform across the entire range, and color errors drop to very low values. The UR8S can be adjusted very precisely here. HDR looks a bit different. The white balance itself can also be noticeably improved, although at the highest brightness levels larger deviations start to appear. What's most interesting, however, is the behavior of the EOTF curve. Even after it is properly set on test patterns, the UR8S can still interpret brightness its own way during movie playback. Depending on the scene, parts of the image are slightly brightened while others are darkened compared to how they should look. This shows that the algorithms responsible for backlight control have a fairly large impact on the final image. So calibration can greatly improve colors, but we can't completely "turn off" the way the UR8S manages brightness in HDR.

Let us revisit the function responsible for smooth gradation and consider its role in improving lower-quality materials. The default smoothing of tonal transitions, while decent, can be further enhanced. The feature includes a slider for adjusting its strength, and we recommend selecting the first option. This setting strikes a balance, offering excellent results without compromising important details through unnecessary blurring.

The image scaling on the LG C4 is commendable, though not entirely without flaws. By default, the image appears slightly sharper, though not to an intrusive degree. While jagged edges on elements like trees are occasionally visible, this issue is relatively minor compared to similar offerings from other manufacturers.

A major advantage of the UR8S is its MediaTek Pentonic 800 processor, and digital image processing is one of this model’s strengths. The TV handles smoothing tonal transitions very well, especially with lower-quality sources. The feature responsible for this effect works effectively without overly interfering with the picture. Even at the medium setting it can noticeably reduce visible banding and unevenness without heavily blurring details. Upscaling also performs very well. Lower-resolution content is displayed cleanly, edges look natural, and the image isn’t overly sharpened. The UR8S simply copes very well with weaker signals, and in that respect it’s one of its clear strengths.

The LG G4 supports a maximum refresh rate of 144 Hz, achievable only when connected to a high-performance PC. Otherwise, the television operates at a maximum of 120 Hz, the recommended setting for viewing sports or content with fast-paced motion. For those prioritising smooth image quality, LG has included a versatile motion smoothing feature called "TrueMotion." This function is split into two adjustable sliders: De-Blur, which sharpens moving images, and De-Judder, which reduces jitter. Both sliders offer a range of settings from 0 to 10, enabling users to fine-tune the motion smoothness to their preference.

The LG OLED C4 boasts an impressive average response time of less than 1 millisecond, as confirmed by our measurements. This results in exceptional image clarity, far surpassing LCD televisions, which often have response times of several milliseconds. This clarity is evident in tests like the "UFO Test," where no trailing blur is visible behind moving objects.

The UR8S is equipped with a panel that has a native 180 Hz refresh rate, so it already offers great potential for smooth motion. The panel itself performs really well, though some limitations typical of VA panels are still visible. Smearing is relatively low for this type of screen, but with faster motion (especially on darker backgrounds) it can still be noticed, particularly when compared with the same image on OLED TVs.

The LG C4, like nearly all OLED televisions from the manufacturer, excels in its compatibility with consoles and PCs. With the inclusion of four full-bandwidth HDMI 2.1 ports supporting 48 Gbps, the TV incorporates a range of features to enhance the gaming experience. Notably, it offers simultaneous support for FreeSync and G-Sync, making it an ideal choice for gamers using AMD or Nvidia graphics cards. For those seeking the best possible gaming quality, the integration of HDR Dolby Vision and HGIG mode is particularly impressive. HDR Dolby Vision operates with remarkably low input lag across all settings, ensuring smooth and responsive gameplay.

A standout feature in LG's televisions is the GameBar, which allows users to adjust settings in real-time without leaving the game. This includes options for customising the image for viewers with visual impairments, a thoughtful addition. Additionally, enabling VRR (Variable Refresh Rate) does not result in a loss of contrast—a benefit of the OLED panel's self-emissive technology, eliminating the need for conventional backlighting. While some slight flickering of grey tones may occur, this is a characteristic of VRR technology across all manufacturers.

In summary: The LG C4, like the brand's other OLED models equipped with high-refresh-rate panels and HDMI 2.1, provides a seamless and immersive gaming experience. For gamers demanding top-tier performance, this TV is an outstanding choice.

In terms of gamer features the UR8S performs really well. The TV supports practically everything you’d expect from a modern console or PC display. It offers ALLM, VRR, and 4K at 120 Hz. It also supports Dolby Vision in game mode, so when using an Xbox Series X you don’t have to give up that HDR format. PC gamers get even more options. The panel can run at 4K/180 Hz, and dropping to Full HD can raise the refresh rate up to 330 Hz. There’s also a Game Bar that lets you quickly view key information and change gaming-related settings. The only clear shortcoming is a proper implementation of HGiG. With it enabled the TV still interferes with HDR brightness mapping, so we don’t get the effect intended by that standard. Aside from that, the UR8S is very well prepared for both consoles and a powerful PC.