Ahh, the seduction of the Seven... I feel ya' brother (this has taken up RFP residence since it's arrival).Biggest difference between all of those and a RH is the RH has a little more curve in the belly and is a bit more tip up. And Officer's Match knows this obviously, but Custom RH's are zero grind chisels.
It's a great knife. Before I went on the current, and long, CQC-7 carrying phase I carried a RH a lot.