It is pretty darn simple to keep track of in the 190D9. There is a very short list of non-perk planes that are faster than you from the deck to 15K (Typhoon RIGHT at 6K, LA7 below 8K, 109K4 above 5K, P51s start to edge you around 10K). There is a somewhat longer list of planes that challenge or exceed you in rate of climb at that alt band. (LA7/Ki-84 down low, Spit8/16/, 109G/K, C205 between 5-10K). There are several American planes that don't out-run, outclimb, or outaccelerate you but can definitely catch you in dives or similar E zoom climbs due to E-retention-Pony, P-38, Jug, and Corsair, watch out for this from LA7s and F6Fs too.
There also a very short list of fighters you turn with equitably with in a 190D9: Another D9, a 190A/F8, maybe a 190A-5 if you are clearly more skilled than the other pilot.