Looks awesome, if I had to guess I would say it was that brisket in particular with more fat than normal, not so much the grade.
It appears to have more fatty sections than I am use to seeing.......
What was the final temp readings on it???
I only ask as I am going to start attempting to keep the temp readings closer to the sub 200 for the next few times.
Somewhere between the 195 and 200 is what I am considering...............
I would like to think it can be as tender and more moist by doing this.....including the extended rest of course.
looks great! how much did it weigh when you put it on?