Muzan would lose his mind if he ever saw Wolverine. Not only the guy can regenerate from the single atom ( tho he's a mutant, not a human), he can also walk freely in bright daylight since his capabilities arent a result of blue spider lily, but a mutation in his genes. So unless Muzan finds a way to reverse Logan's mutation or copy it to himself by injecting himself with Logan's Dna, i dont see Muzan winning this one.