This is one title where (like TWD or Metallica), the Pro is a great pin to own.
Personally, for the difference in price, I'm going Premium.
The Magna-slings are awesome in my opinion. They may not be appreciated in a tournament setting, but they're a fantastic feature. Very unique.
I love the look of the Ecto goggles. The little holograms that appear on the play field are really great quality.
Lastly, the right ramp on the Premium/LE is near perfect in my opinion. To me, it's a little like the Arena ramp in TWD. It's right there, very accessible, and yet hitting it is a small victory. Much tougher than you'd think.
2-D/3-D models and moving Slimer aside, I would pay the difference if these features were after market mods.
Really looking forward to seeing the next code upgrade.