Combat reports by TA152 pilots say that the plane could compet with anything, at most alts, if not all alts, could outmanuver most E fighters at all alts, tempest, P51's, P47's etc.
This it can do in the arean although it isn't the fastest at the deck, problem is that you allways fight in the odds of 10 to 1 when you fly a perk plane, and in teh TA152 you can't run.
Why the spit 9 is better at all alts above 20k is still a mystery to me, P38 about as good aboce 30k as the TA152 is, except for speed (and of course compression).