Don’t think about the actual game, and just think about the BOX. If the BOX is the same - and the title, and it’s categorized as a first or second edition, then it IS the same -version-, by definition.
Just like ALL editions of Classic are lumped into one category, so should Spring 1942 be. And so should Global be.
They are loosely the same map/base game, with adjusted rules.
Also, if you’re going to lump revised in with 1942, that’s the same as lumping all of them in with Classic? Roughly similar map, same powers, same concept. Crazy!
V1 - Classic
V2 - Revised
V3 - Anniversary (1941)
V3 - Anniversary (1942)
V4 - Spring 1942
V4 - Spring 1942 (Second Edition)
V5 - 1941
Simple, elegant, beautiful, perfect. no?