The decision on making a late war versus early war should be based on the use of the unit in the actual war.
First consider the number of units made during war. Volume rates higher.
Next consider when it was in use
If the late war unit arrives in late 1944, forget it.
If the early war unit is not used past 1940, forget it
If the early war unit was used from 1939-42 and the late war unit was a 43-45, so with early war
If the unit was used from 1940-45 , go with that
The truth will be that some units depending on nation will be early mid or late, with no preference for any except for the number produced, time they were in use, and combat experience.
This means no Me-264, Comets, Pershings, He 162, Hortons, lazers, Shinano battleships, Godzilla, etc…