How do those two compare to AUS-8? I am pretty satisfied with my AUS-8 blades.
Carpenter CTS-BD1 is between Aus-8A and 154CM in edge-holding to me. It has slightly more carbon and chrome than Aus-8A.
Which brings out slightly better edge-holding and stain-resistance.
Carpenter CTS-XHP is powered-process, stainless (more chrome than standard) version of D2 tool steel.
Standard D2 isn't considered stainless, but it really comes down to the heat-treating process it goes through.