What makes Quentin Tarantino movies unique?

Tarantino, himself, confirmed in 2016 that the fan theories were true, there was indeed a separate world in which all his works existed but it is a facile reduction to leave it at that. Like many of his films, his cinematic universe is layered and consists of two separate registers of reality. He describes the first register as, “There’s the realer than real universe, alright, and all the characters inhabit that one.”