In scenarios and other more-realistic engagements in AH, P-40's, P-39's, and F4F's are quite good against Zeros and Ki-43's. They are more sturdy, have good amount of ammo, and handle better at speed, which counts for a lot more in those engagements than in low-speed, low-alt furballs.
A similar dynamic is true of FW 190's vs. corresponding Spitfires up until the Mk XII.