Who'd win? Is Alduin technically an Aedra? If so, I guess Mehrunes would win, but Alduin is the world eater... And Mehrunes got banished by two members of the tribunal, and I think Alduin would be stronger than them. I probably should have called this Aedra vs Daedra.

Actually, can a moderater lock this for me? I have a better title and question I'd like to ask.

Locked per OP request.