So Update 10. the optimization list doesn't appear to be too excited about anything getting optimized ...so not sure if that bodes well for consoles.
My own testing in 1080p Ultra land shows a 33% lower performance difference for the same quality settings as horizons in empty space. This is certainly better than the 50% difference before update 10.
However, i'm noticing micro-stutters in ship movement in odyssey update 10 that horizons does not have at all. Even at framerates well above 150fps. In odyssey and horizons there are hits to the framerate whenever you move but odyssey seems to be a bit more drastic of a framerate drop and erratic.. It makes what should be a smooth rotation about your axis a bit jerky. Horizons, the motion is smooth as butter the entire time despite the drop in framerate during movement.
Haven't had time to look at vr or surface / roid performance yet, will have to check out how vr feels after work.