Both TVs share the same 4K (3840 x 2160) resolution across near-identical screen sizes, and their pixel densities of 89 ppi vs 88 ppi are functionally indistinguishable. They also match on 10-bit color depth, 1.07 billion display colors, anti-reflection coating, ambient light sensor, and wide 178° viewing angles — so the baseline viewing experience starts from the same foundation.
The real divergence lies in panel technology and motion handling. The TCL 50C6K uses a QLED Mini-LED panel, which delivers superior local dimming, higher peak brightness, and more saturated colors compared to the Xiaomi's conventional LED-backlit LCD. More critically, the TCL's 144Hz refresh rate versus the Xiaomi's 60Hz is a substantial gap: fast-moving content like sports or gaming will look dramatically smoother on the TCL, and it opens the door to higher frame-rate gaming from compatible sources. A 60Hz panel simply cannot render motion with the same fluidity.
HDR support further widens the gap. The TCL covers HDR10, HDR10+, Dolby Vision, and HLG, meaning it can render the full range of HDR content from streaming platforms, Blu-ray, and broadcast. The Xiaomi supports only HDR10 and HLG, missing out on the dynamic metadata of HDR10+ and Dolby Vision — formats that adjust the image scene-by-scene for more accurate highlights and shadow detail. The TCL 50C6K holds a clear and meaningful advantage in this category across panel quality, motion performance, and HDR versatility.