Having a classic backstory does not mean better. Yes it's classic and iconic, but more original or better? I don't think so, more interesting? Not to me. Batman interests me more because he's a figure born of tradgedy. He's also a bit crazy. The guy has problems, he's not "perfect" like superman. Spider-man is more relatable, he's a normal guy given powers, and instead of going straight out into the world and saving people like Superman, he does what we all would have done. He tried to make money. He learns a life lesson the hard way, and he's ends up with some big emotional insecurities of his own.
Superman is an ailen from outerspace, sent to earth, and he also happens to turn into a almost ridiculously perfect and righteous Superhero. To me, that's a little stale, and old fashioned, because really, so is his origin.