Hopefully I'm not going too off-topic with this...
The SNES version of the original Street Fighter II has unique sprites and stuff in the characters' endings that's never seen in any other version of the game.
See for yourself...
Ryu's Arcade Ending
http://www.vgmuseum.com/end/arcade/a/streetryu.htm
Ryu's SNES Ending
http://www.vgmuseum.com/end/snes/a/sf2ryu.htm
Notice primarily the bunny girl with the trophy and Ryu dragon-punching a waterfall.
You can see the other characters' endings through both links for their respective versions. Once again, the exclusive sprites can ONLY be seen in THIS VERSION of the game. These ARE NOT carried over to SFII Turbo for SNES or Super SFII for SNES.