I am shopping for RB stones in the 0.9-1.0 carat range and I was wondering if someone could explain to me (or show me) the differences between a GIA Ideal Cut with EX polish and symmetry and an AGS 0 stone with ID polish and symmetry? I have looked at some WF ACA stones as well as a GIA Ideal EX/EX at a local B&M. The B&M ran the GIA stone through their Sarin machine and came back at AGS 0 quality. I know that AGS 0 is the more coveted grade, but I am interested in paying for qualities that I can actually see.