I can only speak for Netflix, but it doesn't have a huge selection of Disney. They do have a few gems, but most of the Animated Classics are the less well regarded ones. They have some older ones that are great (Dumbo, The Reluctant Dragon), but mostly it's like late 90's/early 00's stuff (Dinosaur, Emporer's New Groove, etc). They recently added Tarzan which waws one I was waiting for as I had never seen it.
Netflix changes out their movies regularly though so there is potential for different titles in the future.