Although I agree that the F6F is about the closest to the spit8, it, and all other US planes are not going to have that Spit feel. Spits are spoiling with there combination of acceleration, climb and manuverability. You can blow your E in most Spits and still rely on these 3 factors to get an advantage, or stay competitive against most of the other common planes.
US planes are great, but they require more time to learn the flap work and more dilligent attention to your E state.
You'll probably feel neutered in a P40, heavy in the F6F & Corsairs, slow in the F4f/FM2, bored in the 51s, and like a blimp in the Jugs.
All of these feelings can be negated once you learn the planes a bit.
Aspen