I purchased th Pro Edge after going through the 6 and 8 inch white wheels, then the 10" slow wet system, found the constant truing of the wheel face a chore as turning gouge tools tended to groove the wheel too much after one use to then go straight to a wide flat blade like a plane.
Went to The Sorby and found a system that fitted my sharpening needs immediately. Whether gouge, scraper, plane or chisel I can jump between, easily changing the grit if I want a finer finish.
CBN wheels weren't around then, or certainly I never heard of them, as if I did I may never have gone to the Sorby and would probably have been happy with them.
But now I'm here with the Pro Edge, for sharpening, I never go back to a wheel.
I still have a grey 6" wheel for rough grinding though (not tools)".
Phil