You really see the biggest difference in planeset. WB's doesn't have an N1K, But AHII doesn't have:
A-36.
J2M2,or 3
Ki-43
B-25 of any model...
HE-111
Do-17
Well, I know WB doesn't have the LA-7, (But Alot of people wish we did'nt have it here.)
Oh, and the Sherman's, early Pnz IV, Panther....
This is probably the one area the AH still has to catch up on.
[Edit:] I missed the Ki-44, Ju-87G, G4M, Ju-52, Yak-3, P39Q, and a few others...