I like a lot Tim Burton & Christopher Nolan because, even though we are talking about commercial superhero movies, these films have clever scripts, outstanding visuals and excellent casts.
The difference in style comes from the sensibilities of the two directors and also their main influences :
- Tim Burton : gothic horror monsters, retrofuture, film noir, Tod Browning , Lon Chaney, Friedrich Wilhelm Murnau, Robert Wiene, ...
- Christopher Nolan : tech noir, hardboiled, thrillers, James Bond, Ridley Scott, Tony Scott, Michael Mann, A Tale of Two Cities ...
I think that the Smylex commercial in Batman 1989 was a brilliant idea. So was Joker luring the citizens of Gotham to a parade with the promise of free money.
And there are the excellent production designs of Anton Furst (Batman 1989) and Bo Welch (Batman Returns).
For example, the rendition of the Batmobile by Tim Burton & Anton Furst has become one of the most iconic movie cars ever.