Ive debated trading my pro for a premium, but I just cant justify it.
Love the gate / raptor pit and obviously the mechanical t-rex, but for me personally I cant be bothered to spend more money in addition to lugging in/out another game just for a couple toys.
If I didnt yet have the game and found the right deal on a premium id go that route though. Both versions of this game are incredible, especially with the video / sound mod you can do via custom code.