But I recall Wotan mentioning that our Bf109F-4 runs at 1.42ata too - which was not sanctioned in 1941 when the F-4s fought SpitVs over the channel.
Thus, its a fair matchup. In AH1 we had a 12+ boost derated, original '41 SpitV pitted against a 1.42 ara Bf109F-4.
(Or at least, that's what I figured from Wotan)