I'd have to say AH has the most realistic flight model out all those game (however i can't compare it to BOS yet), because combat maneuvers and energy is so well replicated.
A heavy late model 109 (probably a g10 or k4) beats a spit 16. Here you can see just how good the FM is, and if you know what you are doing you can win in any plane. In Aces high however the energy retention is beautiful, it's like in real life, you can realy fly and fight in 190 p47 51, high speed fights in AH are a thing, the author of the game, 'Hitech' flew the real life p51 and you can see it in game's FM.
In il2 1946 planes like 190 p47 p38 and p51 are bricks, they bleed energy and you end up fighting the dogfight which they cannot fight with more oriented dogfight fighters like spit, yak, or 109. I have il2-1946, cliffs of dover, WOFF, WT, Rise of flight (bos not yet but i plan to get it) and compared to them AH shines in ACM and energy managment, sense of speed is unparalleled.When planes goes head on past each other at 300 mph they realy ZOOM and you can feel they go so fast.