Which SFII?
CAPCOM made several different versions: WORLD WARRIOR, CHAMPIONSHIP EDITION, and TURBO/HYPER FIGHTER.
And, then there are the un-official versions: ACCELERATOR ED., RAINBOW ED./THUNDER EDITION, etc.
http://www.arcade-museum.com/game_list.php?letter=S
The easy way to tell the difference between all these games is to look at the title screen.