Batman is a far better hero.
How much courage does it take to face down a gun when the bullets bounce off? How much bravery does it take to face certain death when you can't die?
Batman has been stabbed, shot, and even had his back broken (by Bane) and he still maintains his strict code and mission against Gotham's criminals. It doesn't seem to take much effort or discipline to be Superman.
...oh, was this not a serious poll?