The A6M3 was intended to have better performance... It didn't. It was within 10mph of its predecessor at peak, but because of the new engine had a big dip (like the A6M5 but slower). The engine mount required removal of one aux fuel tank, reducing weight, but the clipped wings reduced climb, so the net gain was zero. The pilots disliked it because it had shorter range and less manuverability (their bread and butter) so the wingtips were added back, and another fuel tank shoe-horned in there.....
Again, net gain almost zero.
The only reason for the A6M3 would be the 10mph gain and the extra ammo in the wings (100rpg instead of 60). Pretty sad reason to include an entire other model, but we've gone on less.
P.S. Do some researching before you request these things... If you had done any checking at all you'd see that we HAVE the I-16 Type 18 (it's one of our weapons loadouts), that the 190A6 is identical to the 190A5, but that our in-game 190A-5 is severely slower than the real deal so it wouldn't matter anyways. You would have realized that the P-39N was basically identical to the P-39Q only it had .30 cal wing guns like the P-39D (which doesn't matter because soviet aces like Pokryshkin removed the wing guns regardless of the letter on the plane).
You would have found that the F6F-3 late models in the production run already had the engine with WEP, that was maintained on the F6F-5, but a streamlined cowling gave it 4mph more speed. You would have found that most folks want the F6F-3 because it would be LIGHTER than the F6F-5 and turn even better.
Or how about you would have learned that there was no real difference between the H and the J -- it was mostly a cosmetic where it had engines that looked "G" and performance that looked "J." It fills no gap.
The P-47D-5, you might have learned, was so short-legged it could barely get to the European continent and back. That said, all the early P-47D models were retrofitted in the field with kits to give them the latest improvements, until there was really no distinction between a D-5 and a D-11, for example.
Seriously, you might do some more research (no, real actual reading) and then at least see what's been wished for a million times already.
It may be harsh, but I felt it needed to be said.