Word on the street is that PMV is the same as cpm154 which is itself an analogue of rwl34
Steels get named by the company that makes them and then some vendors rebrand to make them special
Like zwilling make steels out of sg2 which they call 5000MCD which is also the same as R2
It’s funny 10-15 years ago most of the hobbyist real world steel info was coming from woodworking and planing tests. Knife making has had a massive resurgence and so knife steel info is now often correlated to woodwork tools.
Larrin’s stuff is good, he grew up in his dad’s knife making shop and did a doctorate in metallurgy.