Quoted from RobT:And which version should they all be the same as? The pro? The LE? Which is the "correct" version?
Gary Stern has said several times, he starts with the LE and starts taking stuff off to get the Premium and then Pro.
Video is time linked so click to see Gary say this.
Using GB as an example:
The Premium lost the shaker motor Gary's signature, Lollipop rails.
The Pro dropped the above plus saved money by dropping: The nice playfield lift rails (pegs instead) , the rotating Slimer motor, (up/down instead) Ecto goggles gone, 3D models (replaced with flats) , Subway under PF lost, metal-wire ramps replaced with plastic.
I personally prefer the Premium because I get most of what's on an LE and its the last version released so most of the issues are ironed out.