There are a lot of differences between Disney World and Disneyland. For example, Disneyland is a bit smaller (actually, it’s just more compact) and has Sleeping Beauty Castle whereas Disney World has Cinderella Castle.
Disneyland also has some rides that Disney World doesn’t have, and vice versa. However, one of the biggest differences is that Disneyland can go ALL out with Marvel on the West Coast, whereas Disney World cannot on the East Coast (because of an old contract Marvel has with Universal). So that’s why you’ll find Avengers Campus in Disney California Adventure, as well as a host of Marvel characters. Well, one of those characters is Deadpool (and we honestly NEVER expected him to be in a Disney Park), and he’s now reading holiday stories to visitors. Yep, this is really a thing — and us Disney World-regulars are a little jealous.