Welcome to the ACES HIGH BBS.... I see you have two posts. One of which is advertising another game... I see what you did there... 
They are two completely different types of games. Believe me AH3 isnt going to lose a single customer to WW2OL, Ive spoken about WW2OL many times here on the forum.
AH has 10 times the available aircraft, much better graphics, is easier to learn, better audio. The two just dont have much in common.
There is one thing WW2OL has and that is the ability to recreate realistic WW2 combined arms battles in a real map of Europe. As a flight game, or even a tank game, it cant compare with AH3. Tho I still have fun playing WW2OL. Both are about the last ones standing in the WW2 MMO's, at one time they shared players who played both. But now? They arent in competition.
When I quit it years ago they didnt even have a coder. Now? They have been green lit and are currently writing the Steam integration so things may change there and yes its a very tight nit community that has stayed loyal to the game. Like this one.