USDA Prime Smoked Brisket vs USDA Choice Smoked Brisket

I bought a piece of USDA Prime Grade Brisket from my local butcher and I bought a piece of USDA Choice Grade Brisket from my local grocery store. I try to make sure both Briskets are trimmed to about the same weight and cooked the exact same way. I want to see how much of a difference the grade makes. The results are crazy. Its BRISKET time!!