Well, when you use the "official" ratings for all fighters, the American ships tend to suffer. Firstly, the higher the ratings are for all fighters, the better off the American airplanes are. Secondly, American ships often used higher than official ratings, while other countries sometimes used lower than official ratings.
I skimmed that thread, Dtango, and I didn't see any definite answer. I still have no idea what the Aces High II Me-109K is rated at.