This is a pretty silly question I guess, but I've always been a bit uncertain about what is different when you've got an SCD/ACD compatible game. My assumption would be you've just got more ram to load things into, so loading speed is faster. But I've heard across the years people saying the game will actually access more frames from disc when there's an arcade card in.
I've searched for comparison videos, and can't find any. I searched the forums here, and there was a 3x3 eyes comparison which appears now to be offline.
Anyway - any actual definitive guide to this anywhere, or are others as in the dark as I am?
Thanks :3