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Not even if you got a dead cold perfect edge? hehe :D

Chris you nailed it. It describes what I have perfectly! I have never heard of these before. It's interesting reading the history surrounding them.
Thanks again!

I took a razor to them. I used a Black Devil razor hone in between each stone comparison. It gives a very uniform start. I checked against 4k and 8k King hones and a 12K Super Naniwa.
The grey one...

I got these and both are different. One gives off a creamy looking swarf and the other grey. One has been used and is worn in the center. Both are hard and smooth. The swarf is from using a diamond...