Off the top of my head, I know the F4F is slower and worse climbing. As far as maneuverability, I believe the F6F has the edge on the F4F, but the FM-2 is better than the F6F. F4F has shorter range and less ammo. You can think of the F4F almost as an underpowered F6F, because that is pretty much what the F4F is (not exactly, I know, but very similar).
FM-2 is basically a souped up F4F. More powerful engine, lighter, 4 guns, etc. Not sure about the speed difference, but maneuverability it is far superior and climbs much better. I can't think of the difference between the F6F and FM-2 performance wise (other than speed, where F6F has the advantage).
I will look it up tonight and give you a much better comparison if you want.
-math
p.s. Deja, you really think so?
