Being that I've read Wolverine and Wonder Woman comics, I'm going to have to go with Wolverine.
Wonder Woman has strength and her lasso. Wolverine has his claws, healing, plus his insides are like some super strong unbreakable metal.
One quick swipe from Wolverine could be the end of it right there. But I'm guessing WW could put up a fight. She did kill Medusa once. Plus she has killed alot before, but so has Wolverine, so that wouldn't be a big thing.
Although Wolverine is alot more aggressive, her morals could kick in, and he rips off her clothes and violently fingers her to death.