Plan D, you confused me with that sig-change mid conversation--who's this guy, I thought...
I mentioned the numbers because you did. Basically, if you want to claim that the Stuka had a numerical advantage vis a vis targets, I can point out that the Il-2 had an advantage vis a vis, er, Il-2s...
As I said, though, there's no doubt that the Il-2 was the tougher plane (though that 1-seater-no-rear-gunner thing was a bad idea) but, really ANY ground attack tank buster is going to lose to a fighter. But how many tank killers first flew in 1935, first flew in combat in 1938, and were still flying in 1945?
When you consider that the Il-2 did zip before 1941, then the Stuka is a candidate for best tank buster, on the basis of longevity alone.