Deffo CTS micro-melt Maxamet, I had my Manix 2 in Maxamet tested for its Rockwell on its edge and spine and I actually wrote on here about in a discussion some where, if memory serves I think the edge was really high around 68 HRC to 69 HRC and the spine was lower and came in at around 66 to 67 and we were surprised as it looked as if the blade had a differential heat treat but I think it was prob the differences in the thickness of the blade - spine being thicker means it will be a little lower but there is one HSS that is similar to Maxamet but it actually goes higher than a Rockwell machine can go and that it cpm Rex 121 and that is clocking in at over 72+ HRC but I dunno if Spyderco is making a knife in this steel. Just to give you a idea Tungsten starts at 70 HRC and that is tough stuff. After that you have ZDP 189 , HAP 70, CPM M4, K390, personally I like M4 and K390 and MAXAMET they are my choices. At the moment the only super Transitional super steel Spyderco are using is Maxamet but I have high hopes for Rex 121 and HAP70 and some more K390 and M4 knives. Also K390s party trick is it’s ability to be hardened even further with out suffering a marginal loss of hardness over toughness because when you harden steel to a high hardness you lose toughness so it’s a matter of hitting the sweet spot in the middle, usually depending on what you are wanting the steel for or wanting it do fir you.
Liberty and the pursuit of happiness is everyone’s god given right