I was sent a Samsung 85” Q80B instead of a Q80A. Only difference I see is backlight dimming but not sure if it's just different notes. Also saw that the A has
55" Class QLED 4K Q80A (2021) | Samsung US
Samsung Q80A QLED Full Array: Review and opinion - TV & Hi-Fi Pro in English
Samsung QN85A vs Q80A: QLED TVs that couldn't be more different | TechRadar