the only reason why I would say the halo universe would win is because of how devastating the halo rings are. how devastating the flood is. without those 2 aspects the star wars universe would dominate, sure the humans devastating mac guns penetrate star ships like its nothing... BUT the shear amount of how many races, how many armies, how many starships that are created and destroyed in the starwars universe is amazing. plus the jedi? I mean come on! the only thing scarier than a sith lord or a jedi as an enemy is a flood infected jedi.