The difference in cost is due to the proprietary Microsoft chip, Microsoft licensing costs, and Dolby Atmos license. It is also the more 'universal' of the two, though we still recommend the PS version for Playstation due to tweaks made in the PS dongle mode to utilize the hardware more eficiently (tuning, volume output, lower potential distortion on the PS console mode).
PS5 usb volume output can be low if an audio device isn't targeted to the system. This can lead to higher noise due to pushing devices harder, etc.