• The console release of SSF4 Arcade Edition will be a perfect port of the version currently in arcades. Do not anticipate any balance changes in AE.



• SSF4 users who don't upgrade to AE can't play against the new characters, but they get the increased search functionality of the replay system. They can also watch Arcade Edition matches.



• It's not setup like Anniversary Edition where you could pick different versions of characters from the games. When you start the title up, you can choose to either play SSF4 or AE.



• You do not get the balance updates for your characters if you don't upgrade. The developers wanted to leave SSF4 alone for people who still wanted to play that iteration of Street Fighter, also they weren't sure how the old characters would stack up against the new fighters, Yang, Yun, Evil Ryu and Oni, without the balance changes they received in the new title.