Originally Posted by ash_735
The way I see it:
360 Version: 1280x720 Progressive, 30fps (Locked), 2xAA
PC Version: Upto 2560x1600 Progressive, Variable Frame Rate (as good as you can handle), upto 8xAA (Maybe 16xAA If RAGE is efficent enough on computers)
So it's bound to at least look better and sharper in some ways and at least play better with the unlocked frame rate like all past GTA Games do on PC.
Even though this is true, I have tried it in 720p, 1080i and 1080p and 1080p is definitely the best.