Both the Hisense 55A6Q and the Samsung QN85QEF1AF share the same native 4K (3840 x 2160) resolution, 10-bit color depth, 1070 million displayable colors, and a 60Hz refresh rate — so at the foundational level, these panels are evenly matched in terms of raw resolution and color pipeline. HDR support is broad on both, covering HDR10, HDR10+, and HLG. The one notable HDR divergence is that the Hisense supports Dolby Vision while the Samsung does not, which matters if you regularly stream from platforms like Netflix or Apple TV+ that serve Dolby Vision-mastered content.
Where the two TVs diverge most meaningfully is in panel technology and the physical relationship between screen size and pixel density. The Samsung uses a QLED (quantum dot) layer over its LCD, which typically yields more saturated, vibrant colors and stronger brightness compared to a conventional LED-backlit LCD like the Hisense. However, the Samsung's much larger 84.5″ screen spreading the same 4K pixel count results in a pixel density of just 52 ppi, versus the Hisense's 80 ppi on its 55″ panel. In practice, this means individual pixels on the Samsung become more visible at closer viewing distances — the Hisense will appear noticeably sharper if you sit within roughly 8–10 feet of the screen.
In terms of display edge, the verdict depends on your priority. The Samsung's QLED technology gives it a likely advantage in color volume and peak brightness, and its sheer screen size dominates for large-room, distance viewing where the lower pixel density is less perceptible. The Hisense, on the other hand, holds the edge in pixel sharpness and adds Dolby Vision support — making it the stronger choice for closer viewing setups or HDR content variety. Neither TV has a monopoly on superiority here; the right pick depends heavily on room size and seating distance.