PSN is the standard edition. You have to buy the $10 DLC to have everything that is on the collectors edition. The DLC/Collectors edition gives you a season mode and a couple themes for creating courses (Delta and Tropical) which you must have to play any created courses using these specific themes.

So what is up on PSN is $29.99 and you still have to buy DLC.
Amazon is everything (Collectors edition) at $29.99, plus you get an E-Book of some kind.