Re: Superhero settings vs People with Powers settings
I've always felt that PWP stories have less-rubbery science and less-overt heroes and villains. The heroes and villains are largely unknown to the general populace. The actual existence of powers is either completely unknown outside the powered community or outsiders hold "superpowers" in the same sort of skeptical disdain as the Loch-Ness Monster, Sasquatch, or the Abominable Snowman. There may be some unpowered "true-believers" who have met or at least heard about these mysterious individuals with superpowers, along with some opportunists who don't believe in anything but an opportunity to sell powers-related merchandise (books, "artifacts", seminars, etc., just like any good moneymaking cult).
Superhero settings usually include more fantastic origins than PWP. How many PWP stories feature someone who is transformed by a nuclear explosion (Hulk), Rocketed to Earth from a Dying Civilization (Superman), or a "god" (Thor). Also I think Supers are definitely in the "wear distinctive outfit" camp, whereas in a PWP setting, everyone wears pretty-much what normal people might under similar circumstances.