With some air moving over the wings the A8 is quite capable as long as the speed is up and let's face it, that's how most of the 190's are flown. In a diving attack the turn rate and climb rate, while not incredible, are acceptable and all that WEP helps a lot in both a turn and in the zoom. The same can't be said of the 110. You need to throttle the 110 back in a dive giving up valuable E. If you fly the A8 like a 190 it's just fine. If you fly it like a zeke you're dead but that holds true for all the 190's (although the A5 lets you get a little closer).
IMO in a higher speed diving attack the A8 will actually out-turn the Dora. This is why I don't like the Dora. It fights you. In fact I think the A8 might out-turn the Dora in a lufberry on the deck as well (I havn't looked at the official numbers). At least I've never been afraid to try to out-turn a Dora and I can't remember losing to one in such a fight.
With some E, using the A8's roll rate in combination with advanced ACM I've killed every type of plane in the MA's, even the turny ones, but the window is short for a gun solution so you need to be thinking ahead all the time. Like I said, give me a guns solution and I'll give you a downed pilot.
I've actually even won stall fights against Spits, F4U's, P-47's, 109K-4's, P-38's and the list goes on. Now I'll attribute most of that to luck and pilot skill (not mine... lack of skill on the part of the other pilots primarily) although one of those K4 kills was against a very accomplished AH stick who's still alive in the dueling bracket. It was still luck to a degree... he ran out of fuel after we had been going at it for 3-4 minutes.
Anyway, as I said, I like the plane and given the general competition level in the MA's it's quite capable.