Originally Posted by The Joker
He's much darker than Nicholson's. For instance that TV broadcast where he terrorizes the copycat Batman was creepier than any scene with Nicholson's Joker.
Lol, now it's me defending Burton's movie but I don't think so. Ledger's Joker seems more creepy because of the serious atmosphere of the movies but most of his action are just the "LOOK, I AM SO CRAZY!!!" thing.
While Nicholson's Joker's action were more, I don't know, casual? He simply killed people without making much fuss out of it.
Ledger was more like the Joker in "The Killing Joke", seemed insecure and tries to justify his action, while Nicholson was more like about the fun and total disregard of life. He also killed a lot more people.
But I must add that the 89 Joker is partially a Black Mask rip-off. The whole cosmetics thing gives it away and Alicia = Circe.