Clouds too emo and would probably cut himself long before his fight with Wolverine started giving Wolverine a much larger advantage. Beyond that Cloud's sword would get busted up after hitting solid admantium with the force it takes him to swing that thing after a while and it will sooner or later just become a massive metal baseball bat.

Coincidentally one time while I was in class back in high school the debate came up on who would win, Wolverine vs Godzilla. I was contacted as the guru of geekiness to make the call on who would win by the rest of the class.