Wasn't being disingenuous. A German AA gunner, especially during this period of the war with the Soviet drive to Berlin, would have been very hard pressed to tell the difference between a P-39 and a P-63. Hell, even Allied fighter pilots had a tough time telling the difference between Allied and Axis fighters and you think a German gunner that was probably a young teenager or an elderly man with rudimentary aircraft identification training would be able to spot the minor visual differences between the P-39 and P-63 that is attacking them?
As I mentioned before, if you're going to argue for the inclusion of the P-63, you better use better arguments than using an A2A encounter that may or may not have happened or the rumored use of the P-63 over Germany in the final months of the war. A smart man would use the fact the P-63 did conduct ground support missions during Operation August Storm to argue their point to get the P-63 added instead of unverified claims.
ack-ack
This late in the war, it was easier for a russian to identify a Tiger tank from a tree. However for a German, the biggest problem is you have to consider how many LIVING soldiers are left alive. Not everyone can put a book out like stephen ambrose. I made the argument a few times using living pilots who said the C.205 used drop tanks and it was unnoticed. Fact is can you anyone take the word of one "pilot" over a theater of pilots? No. A normal gunner in berlin during 1945 is not going to tell the difference been a stuka or a B17. I'm pretty sure they are given the basic instructions on how to spot and aircraft and just start blasting away.
What little information there is, is not going to be posted if it hasn't been posted already. Considering how late in the war is, the russians wouldn't bother since they never kept records either. What records the germans did keep (and were great at it) were probably burned at this point.
Without facts, its hard to say, the winner usually keeps good records as for the russians - they never bothered.