The only games that I'd go out of my way to get a Prem/Le model are ACDC and TWD. ACDC because of the improved bell and color changers and TWD because of the Walker bombs and spinners primarily. Met is the only other one I'd consider just because the Pro model is missing the spinners which make the orbit shots feel naked.
On every other Stern game though I'd go Pro without hesitation. There are actually a few games like GOT, GB, Transformers, and X-Men where the Pro is the better playing game.