The PS3 version of Devil May Cry 4 had a mandatory install, but Street Fighter IV does not. If you want to shave off load times between brawls you still can, though. Seth Killian, Community Manager at Capcom, confirms an optional install is a feature is in the PlayStation 3 game. Details about the amount of space an install will take weren’t described, but you mind as well put that 20/40/60/80/X (you upgraded your PS3’s hard drive on your own) GB hard drive to good use!
Images courtesy of Capcom.