All depends really is it Aizen without the Hogyoku or does he have it since I remember Aizen saying to Isshin that he pushed him to his Shinigami limits.
But just to have an answer Aizen wins all of them.
You must have not seen all the eps yet if so you would know the answer..are we talking with hogyoku or with out but I don't think it really matters his sword ability is to hax..unless they pull a Yamamoto an get stabbed on purpose.