11GB or 8GB VRAM? (going VR soon)

[bumblebomb]

Looking at VR in near future question is: 1080Ti/11GB or 2080/8GB.

 

I know DCS uses more than 8GB VRAM if it finds it, but does it make a difference, and how much of a difference in VR with, say, a HP Reverb which renders 4K effectively?