Quoted from The_Dude_Abides:
TRON LE has lit color changing ramps, chrome rails and lock down bar & legs, drop targets instead of stand up targets, moving recognizer, and an extra multiball (daft punk multiball). The playfield on the LE also came with an extra coat of clear.
The LE looks great and the lit ramps really make the pin pop without a doubt. The gameplay is just about identical. The daft punk multiball is pretty cool. It really comes down to how important aesthetics and the multiball are to you . To some it is very important. There is a mod that is supposedly coming out for the pro to light the ramps very similarly to the LE but then again that is not a sure thing. On a pin this expensive I would say track one down and play it before spending that much on it. I could not justify spending $5,000 more for the LE but that is just like my opinion man. Both are sweet pins either way your getting a winner.
Dude, that is about as good of a summary as could be written!
I'm not sure if it was ever confirmed that the LE had an extra coat of clear compared to the pro?