I actually meant the J35A3 (not recommending for him just asking). I looked into it for building a boosted engine with new forged rods and pistons, and the J35A3 block has the same casting number as the J32A2 which is supposed to be a little stronger and have better cylinder liners, and also slightly better breathing from heads and cams?
But if you are not boosting the engine probably not much real world difference between the 2, like you said, plus the A4 comes in Hondas so easier and cheaper to find.