I've had an older 560 which was a nice flipper. I have NOT owned one in S110v. I do have a Spyderco 2013 Forum Knife, in S110V, which has a measured hardness of 63, according to both Sal Glesser (Spyderco CEO) and Jim Ankerson (knife-testing guru). The much larger 0560 may well be intended for more heavy-duty operation, and so the hardness difference between the two folders is not terribly surprising. Very interesting, however.
Poster 5.56 writes, of the 0560 in S110v... "It will greatly outperform the Elmax on my ZT0551 if that helps." I do have a new 0550 Gen2 with Elmax. If I'm not mistaken, ZT hardened the Elmax considerably on these newer generation folders, due to published (videos) edge-holding problems of some owners with the first generation Elmax folders. Would also like clarification on this issue by anyone who might know...
Sonnydaze