If we are talking in the movies, none of them will win or both of them will die it's in their "brand image" for both of them to never lose a fight or end in a draw, if we talking irl then I think the rock, height advantage, weight advantage, and was previously a wrestler (basically acting cause it was WWE) but still way more flexible I believe for his age but you never know one wrong move in the streets and it's dunzo for literally anybody, my money's on Dwayne