[quote name='gunm']So what is different in AE besides those two shoto hacks?[/QUOTE]
The twins are in the game (Yang and Yun). Character tweaks, example:
Bison's st. hk does less damage at range, full damage close. Ultra 2 move is now a charge.
Both Honda and Balrog's Ultra 2 are two half circles rather than 720's.
The list goes on, but a lot of small changes have been put in. Would have been nice to see AE give everyone a third ultra, but that would have been too much to ask for. Because of how the character screen is now tweaked, it would be a safe bet to assume AE will get at least two more characters.