Choose wislei.
But before, watch the end of the dark knight returns
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Look, Batman only ever wins down to sheer luck and the very obvious fact that Supes is a complete pansy and holds back all the time. Character wise, yes Batman is infinitesimally superior in that category. But let's be realistic and take a look at the Goku vs Superman Death Battle. No way in hell would Batman win if Supes was on bloodlust. Regardless of how much time he had to prepare.