There is a big variety in graphics and gameplay between all those levels. Each world is very different and the diversity of the levels is very impressive.
Prepare yourself for SouthPark Mario Brothers
Super Mario 64 1.2
Super Mario 64 is an interesting adventure game
Super Mario 63 1.0
Super Mario 63 is a adventure game.
Super Mario Bros 1.0
Super Mario Bros is an adventure game.
Super Mario World is an adventure game.