Patrick Chase
Fallkniven's "Super Gold Powder Steel" (SGPS) is notably similar to Carpenter CTS-XHP, a.k.a. PM-V11, which is also a PM stainless.

SGPS has slightly lower Carbon and higher Vanadium, but otherwise the nominals are close. I would expect SGPS to be harder to sharpen and somewhat more abrasion resistant because of the Vanadium.

It's probably worth noting that Konrad uses PM-V11 at Rc62.5 in his plane irons, so his tastes appear to be self-consistent :-)