Yep, more fat in a brisket than a butt, usually.
Here's a formula to determine the amount of fat that will be rendered by any cut of meat:
1.5*(fn(t_o_m)*lb)/toc-(218/tempoc*10)+(hod/aatc) = amount of fat rendered
IMBAS Certified MOINK Ball maker and IMBAS Sgt. At Arms.
And now, brethren, I commend you to God, and to the word of his grace, which is able to build you up, and to give you an inheritance among all them which are sanctified. [Acts 20:32 KJV]