Both the LG OLED83B5PUA and the Samsung QN83S85FAE share a strong display foundation: identical OLED/AMOLED panel technology, a native 3840 x 2160 resolution at 53 ppi, a 10-bit color pipeline rendering over a billion colors, a 120Hz refresh rate, and wide 178° viewing angles in both axes. In practice, this means both screens deliver the hallmark OLED traits — perfect blacks, infinite contrast, and color accuracy — at a size and refresh rate well suited for both cinematic content and fast-motion sports.
The most consequential split between these two sets lies in HDR format support. The LG supports Dolby Vision but not HDR10+, while the Samsung supports HDR10+ but not Dolby Vision. This is a real-world content compatibility issue: streaming platforms like Netflix and Apple TV+ lean heavily on Dolby Vision, making the LG the stronger pick for those ecosystems. Samsung's HDR10+ advantage, on the other hand, is more relevant to 4K Blu-ray titles and Amazon Prime Video content encoded in that format. Neither format is universally superior in image quality, so the ″right″ choice depends entirely on where the user sources their content. Both sets share HDR10 and HLG support as a common baseline.
For gaming, the LG holds a notable edge: it adds Nvidia G-Sync compatibility on top of the AMD FreeSync and FreeSync Premium tiers that the Samsung also carries. This matters if the user connects a PC with an Nvidia GPU, as G-Sync ensures tear-free, low-latency output that FreeSync alone cannot guarantee on Nvidia hardware. The Samsung is limited to the AMD FreeSync ecosystem. Overall, the LG has a slight advantage for mixed-platform gaming setups and Dolby Vision content, while the Samsung edges ahead specifically for HDR10+ content libraries — making the HDR format question the deciding factor for most buyers.