Have a look at the features Matrix, and decide if the extras are “Worth it” to you.
Everybody with a Pro will tell you the Premium isn’t worth it. Everybody with a Premium will tell you they couldn’t live with a Pro.
I learned to love the game on a Pro on location. It’s a really fun game. Can’t go wrong.
The Spinners are a huge plus in my mind. Everybody has different priorities though.
Best of luck
http://sternpinball.com/upload/games/guardians-of-the-galaxy/premium/GOTG%20Feature%20Matrix.pdf