Quoted from Concretehardt:Not sure what else I’m forgetting
I play a premium at one of my favorite locations and pro at another favorite. By now I don't feel there is any difference that matters to me. But there is a mode that is only premium/LE called "can I play with madness" Have heard insider connected adds it but the game I play doesn't have it. Its fun so might be more important to you than the ball lock or underworld.
But I put a deposit down on a pro. I think this is one of the best examples of Elwin packing the pro with fun. Not all designers do ( looking at you Steve)