https://www.youtube.com/watch?v=qvSKoRiLk54 Sony Bravia X8000H series supports Dolby Vision and Dolby Atmos, and packs X1 4K HDR image processor, X-Balanced speaker system (65 and 85-inch models only). The Bravia X8000H series also supports Apple AirPlay and HomeKit technologies. The Bravia X7500H series carries HDR support, the X1 image processor, a bass-reflex speaker system, and slim bezels. Both series run on Android TV, with Google Assistant integration that can be summoned via the remote. The X800H is marginally better than the  X750H. The X800H gets much brighter in both SDR and HDR, it has wider viewing angles due to its IPS panel, and faster response time. The X800H also has better color accuracy out of the box. On the other hand, the X750H has a VA panel with a much higher contrast ratio, making it a better choice for dark rooms.