Two versions of Street Fighter II were made for the Super Nintendo. They were Street Fighter II and Street Fighter II:TURBO. Turbo was the best.
On the original Street Fighter II you can choose to play as one of eight fighters. You can't choose to play as any of the last four fighters on the game.
The last four fighters are: Balrog, Vega, Sagot, and M.Bison. Street Fighter II:TURBO allows you to play as those last four characters.
Turbo also allows you to fight the same character who you are playing as. The original Street Fighter II doesn't. On the original you fight eleven people. On Turbo you fight twleve people.
If you want Street Fighter II for the Super Nintendo, buy Turbo.
