Ah, the Eternal Struggle - not between Good and Evil, but - who's cooler, Batty or Supes?
I always fall back on the line that Supes was born with his powers, already had the suit, didn't have to do squat except discover his powers at an early age and then use them.
Bats? He had it rough, man. Watched his parents shot down - had to train nonstop to get into fighting shape - had to come up with all his own gadgets.
Plus, of course - the deciding factor - the outfits.
I mean, c'mon - red and blue with a big-ass "S"? Riiight...
Basic black is SO much more fashionable, and it doesn't clash with your arch-nemesis' outfit.