Not really a lot of difference to gameplay, but a lot of bling if you want it.
On Tron just to add Eli ramp lights and Arcade mod that's $600 (iirc).
PF supports are $50
Laser beam can't really add that to a pro but if you could it'd be $100+
Warp ramp light bling it'd probably be $80+
Color changing apron is also cool, I'm not sure if this is on the premium, I have the LE
Color changing inserts are awesome but just bling, probably will never be a mod, but as a Color DMD costs $400 for bling, I'd say the full color changing inserts are worth about that if I was looking at Eli ramp light kit for Tron as an example.
Crashing Vengeance it's totally cool also.
No one will say the gameplay difference is worth $$$$ but most people like bling, if you don't care about that than get the pro.
Also Met color changing light mod is for just GI not inserts right and doesn't that cost $300 plus hours of installation.