A couple things I've noticed: you can hear Q breathing heavily (something I don't remember in the DC version), and it seems like the second and third round soundtrack mixes come in late (like 5 seconds into the round the music will change, instead of at the start of the round).
As for SF2, which is the original arcade music? You can choose CPS1, 2, and arrange. Arrange is the 3DO version, right? Was any SF other than 1 on the CPS1 board?
Everyone is talking about sticks. I got my first, some Hori Soul Calibur 2 sticks a while back. I couldnt' get used to them. I like the PS2 pad for GG and the Saturn pad for CvsSNK2 (can't wait for the Xbox version of 3S to come out so I can use the Saturn pad).
