I am not as concerned with the price but more if I feel like the extra features are worth the $$ and also the art. I think premium has a whole side with the raptors which to me are as much a part of JP as is T-Rex.
Spinning chopper blades is nice on the premium but I wish they'd spin more than just one or two turns, but that is a ball interaction.
Raptor pen is nice (?)
T-Rex is the big thing if there wasn't the T-Rex ball grab and movement then I won't buy the premium. My wife said to me (she's not into pinball) but she said that's the main feature on the game so having a game (pro) without that is like missing a main feature.
Not sure if anything else is different to the premium.
I like when the pro/premium are very close like ST and like this pin. I don't like as much when whole areas of the PF are added or subtracted like GOT or BK although I like the lower PF in AcDc premium. I think when it comes to a whole PF added or subtracted it means a lot more to which model you get but with JP it looks like all models will play about the same.
I have found several pros that I like as much or more (Met and TWD specifically maybe Got as well) TWD left lift ramp is not that great (IMO). I think sometimes the pro plays better or less things to fuss with like the hammer or the crossbow. I am not sure if the T-Rex is worth it but so far to me it looks extra cool.
I've not played enough Maiden to determine if I like the premium better, I have the pro but could upgrade to the premium if I feel like it's worth the extra money.