i guess it's pretty obvious that we're assuming you mean, by "versus", a fight between them? Duh! Supa-man would win that, of course.
however, if you're asking who's my personal preference: batman is a way cooler and more developed character, IMO. he has a dark side, and is a vigilante. superboyscout is holier-than-thou stuff from "the golden age" of .. I dunno, the 50's?
besides, the first batman movie (don't even SPEAK of the others) was better than all the superman flicks combined. and the TV show with Adam West was hysterical -- BIFF!!! POW!!! KAZAAM!!!