Hello there, my friend...
I just wanted to tell you that I have been also looking around for Spyderco hones...
I found that grit of Medium side is approx 4k and Fine side is approx 8k... So, something like Norton...
But the good thing is that they are very hard and they come lapped from factory...
I ordered their Ultra Fine bench stone which is approx 13-14k for 480 kn or 85$...
From what I have read, they are worth the investment...