I used to fly WB's, but was fed up with lack of development, problems with the damage model (Elevator is one piece and always seems to fall of, it falls off, it FALLS THE "F" OFF!!!!), and lack of strategy concept.
AH is superior in just about every aspect, although the skins in WB's are a bit more crisp. However you don't notice a difference because of a little thing called "minrender".
The ONLY other thing WB's really offers, is a platform for Mac users to fly on.
If you're looking for a flight sim, AHII is the one to go with in my opinion. It's updated, and maintained, and has a LOT more players.