You are right about the rim feeling beefier than EZE, but the rim in my zero felt around similar heft, if you will. I don't know if there is a different mold involved, but does it matter? We would all love this disc even if it was called the Opto Bag of Poop. It just flies so well.
Bag contents subject to change:
PD / TD / Fury / FD / Warship / Pain / Judge / Breaker