Darth Maul would clearly win in this fight. First Darth Vader is too slow and stiff as a rock. Also Darth Vader couldn't handle The Double Bladed Lightsaber. Lastly, Darth Maul fought Obi-Wan and The other guy (forgot his name)at the same time and Darth Vader lost to obi-wan in episode 3. but wait obiwan should of lost to Darth Maul (if it wasnt for the story line :p). So that means Darth Maul would kill Darth Vader.