It doesn't matter. Anything above S30V/VG10 is probably good enough for my applications. At the higher echelons of steel, not many users will truly notice the difference, imo. Of course you can do rope cutting tests and what not, but honestly, what's another 500 cuts on rope to the average user? It's unusual if I use my knife for 10 minutes a day, much less make a couple thousand cuts on rope. Anyway, if you are a knifemaker, I think it is more important to consider what steel is easiest for you to work with and heat treat first. A well-made and well heat treated knife beats out a super steel any day in my book.