while I haven't measured them against each other, at least they have the same look and specs.
this summer we will replace a studer build studio, I'm sure I can desolder one or two for measuring and comparison after that was done ;D
as you can see, 1.022.301 and 1.022.405 don't have same design...
the .405 studer line trafo are a Neutrik NTL
the .400 mic trafo are a neutrik NTM
for the 301 i don't know, maybe inside it's the same...