1v1, no plane in the CT can take on a Spit 9. That said, a good pilot in one of the other planes has about a 50% chance of killing a bad pilot in a Spit 9. The other half the time, they'll get a ping on you with the Hizooka and end the fight right at the beginning.
On the deck, the 190a5 and the Spit IX have identical acceleration in level flight. In a dive, I think the Spit accelerates much much better. The 109's accelerate better, but good luck extending away from a Spit IX before he lands the one hit he needs to knock your tail off. Turn rate obviously goes to the Spit IX, as does vertical performance (go ahead and try to rope a Spit IX going the same speed as you in any prop plane). Roll rate goes to the 190, then the spit, with the 109s being pathetic in that department. Firepower isnt even close, the Spit IX can deal a lot more damage a lot easier than any of the Axis planes.
Your only real 'chance' to kill a good pilot in a Spit 9 is to bore and zoom.. climb to 25k and pray you don't meet a spit within 2-3k of your altititude, because he'll eat you alive. If you have a 10,000 foot alt cushion, you can Bore and Zoom in a 190a5 until the Spit gets tired and flies back home or runs out of gas. Or you can 'turnfight' with them and if you are an extraordinary pilot you'll win about 50% of the fights. You'll be able to kill the really horrible spit pilots in anything, but as long as they know to keep turning hard in one direction you'll probably have a tough time.
