Another difference is that comic heroes keep on going. Dupin and Sherlock Holmes have their pastiches, but in general the stories of them are done. They're in the past. New characters can evolve as the genre evolve, and they're not stuck in a shared continuity where Dupin is STILL deducting in a modern Paris, Holmes in a modern London. (Well, there's the TV series SHERLOCK, but you know what I mean). Most TV detectives these days are police procedurals, not the hard-boiled detectives of the thirties and forties, much less the eccentric genius of Victorian fiction. Nor are they stuck in a shared universe (unless you're a follower of Wold Newton theories) like most comic book heroes are, where they share a universe with characters conceived in the thirties and forties. They can start again, in the "real" world and take their own tangent---owing the past, but not stuck in it. Unlike comic heroes.