Tsuna never had a Daemon. He had Mukuro. That being said, I barely give it to Aizen only because he's immortal and the Kurohitsugi spell. Daemon shouldn't be able to block that or tank it, but that wouldnt necessarily kill him because he can make 5 duplicate bodies. Also Kyouka Suigetsu wouldn't work on Daemon who specializes in casting and seeing through both illusions and mind powers. Aizen wins this by sheer stamina and to some extent firepower.
@taichokage: When Spade Makes his multple bodies, all damage done to him is cut down by 1/6 unless you hit all of them at the same time. Spade could also BFR Aizen as well. Spade also tanked a full power XX burner.