I have the pro. I have played the premium and didn't like the left ramp or the crossbow. There is at least one Pinsider who owned the premium/LE and swapped for the pro. Can't find the posts he's explained why. Eskaybee has reasons why he thinks the pro is better (or equal) and he used to own the premium.
IMO the pro (should/does) flow better. No bash toy under the left ramp, no Crossbow, some people don't like the extra magnet in front of the Well Walker.
Just because something is *extra* or added doesn't mean it's better, people say they don't like the Scolari brothers on GB premium and the moving ramp on XMLE was meh at best.
Most people who own the LE/premium will say it's better because what else will they say? People who bought the LE would rather have a vasectomy without local anesthesia than to say the pro is better.
The LE does have the best cab art package and the GI lighting effects and the spinners are great.