Welcome Clownbaby. You'll find that you really love the fact that Aces High is so much more varied and polished than WB's, and you'll find yourself back in the groove in pretty short order.
If you flew WB III then:
a) make sure you give yourself a little more separation before you turn back into an attacker than you are used to...
b) make sure you don't let him get guns on on you - gunnery is not much different in AH than you're used to - but the guns (especially cannons) generally work as they should here, so trading shots is a bad thing.
c) The Niki, LA7 and Spit 16 are the new KI84.
d) You drop the troops on the town, not on the field for a capture.
If you flew 2.x, then just say "Wow" and enjoy.
!