Only HTC could answer that, but I imagine all the different flight models aren't condensed down to one for AI, but the AI may be able to fly at the limit of each plane's performance which humans would be less likely to consistently do.
Not sure how you would model human error or inconsistency.
We have no ability adjustment. The only thing we can do is set them to "attack" which means they will engage you within 3000 yards or "patrol" where they engage you within 1500 yards.