You can see the list of features in WOFF here:

http://www.wingsoverflandersfields.com/features.html

and the V2 Expansion feature list is here:

http://www.wingsoverflandersfields.com/featuresWOFFExpansion.html

I believe that's 64 aircraft between WOFF and WOFF V2. Zepps in V2 are not flyable, but everything else on the lists are.

I also think it's worth taking a look at the AI for WOFF, which is incredibly advanced and using decision making logic based upon a great number of factors in order to decide what to do next, instead of just randomly rolling "dice".

http://www.wingsoverflandersfields.com/features-AI.html

Besides WOFF and the V2 Expansion, I also highly recommend the Skinpack which adds thousands of historically accurate paint jobs to the sim.