No, the difference is by color. Apparently there are different hardnesses of Cerakote for different uses.
It was originally developed as a heat-dissipation coating for stuff that gets really hot, like engine manifolds, since silica transmits heat quickly. Which makes Cerakote an effective coating for the barrels on prairie-dog rifles.
The guy I talked to is no longer with that particular company, so the best thing to do would be to contact the Cerakote company.
Okay, thanks. I was on the phone with them today talking colors, and they are sending me some swatches and I'm to circle back with them when they arrive. So I'll ask then as we move forward.
Thanks for all your help and advice!
