Hard to say, I have a couple of coti's that give a very enjoyable and durable edge I go through phases when using stones, back when I started I would finish solely on a Charney forest as that's all I had it was a dam good edge, a very good friend of mine, Hanzo who is a member on most forums but doesn't really participate anymore sadly has had many a razor from me and never complained about the way they shave,
I went from using the CF to a SG20K and now coti.
I would guess my CF to be around 16k plus