Anybody have any real world comparisons between the following balls?  Length, roll, backend, shape.  Comparisons would need to be on similar patterns, similar layouts, and similar styles.  Not looking for exact, but close.

Double Agent vs Raw Hammer Pain
Shift vs Raw Hammer Toxic
Agent vs Raw Hammer Toxic

I already have the Pain and the Toxic.  I just picked up the Double Agent and Agent from Jeff. I didnt need them but its for charity.  I have an idea of what I want these two balls to do, but want to verify they arent real close to what I already have.  I am also thinking of picking up a shift.