I would agree about the C205, I wonder how a 205 vs P38 fight would end up with equal pilots, if there is such a thing. The 205 doesn't have any of the K4's ability to take the fight nose up and eventually beat the P38 that way, so far as turn rate/radius, I have a feeling they 205 and P38 are pretty close. Flaps use, I'm not sure either, but I think the P38 probably has an advantage once the flaps are out. Firepower, the 205 has decent guns, but the P38 obviously has better accuracy, or at least no convergence issues accuracy wise.
I'm not certain, but I think that the 205/38 match up would be pretty close, and they would be ranked fairly close on the ladder if you were ranking which planes are "easiest" or "easiest to kill/fight with".
Has anyone done any dueling/testing with these two planes?