hulk all the way. jsut cause you cant break adamentantium doesnt mean you cant strip the flesh off the metal cause i seriously doubt wolverines healing powers are fast enough to regenerate pretty much going though a cheese grater. now dont get me wrong wolvs healing powers are good just not good enough.
They actually have met and Hulk rips Wolverine in two pieces and throws em far away.... Wolverine proceeds to look for his lower body half. Btw Hulk actually IS the gayest character around. They made him so invulnerable... "the angrier he gets the stronger he gets", he'd survive nuclear blast cuz it'd make him angry, he'd survive being dropped off in the athmosphere cuz he doesnt like the view etc. You cant even kill his human form, cuz he will revert to hulk and regenerate... Although in "Punisher Kills The Marvel Universe" he dies by Headshot while being in human form, which is some incontinueity.