Who would win in a fight, Gandalf or Obi-Wan Kenobi?
It's Sci-fi vs. Fantasy! One is an outcast Jedi Knight, who can control the minds of the weak, sense the presence of life around him and move things with his mind. The other is a wandering wizard who can teleport, conjur light and even make the sun rise early.
One is 57, the other has walked the Earth for over 300 lives of men. One wields a light saber, the other Glamdring. One is an Istari who defeated the Balrog -- a demon of the ancient world, while the other took on the universe's greatest villain... twice.
Oh, and they both came back from the dead.
So who would win? Does living for thousands of additional years mean you have more experience, or are just lucky to be moving? How about moving obejcts? It's a lot more impressive to move the sun instead of a small object, but is it more useful? One can cut through anything with his light saber, but can the other control the very energy that it relies on? Then again, elven forged metal is very impressive, but wouldn't a light saber go though it like a hot knife through butter?
So who is the winner?