I usually use the Fortifications doctrine while playing OKW.
What I haven't yet figured out is the real difference between the MG34 Gun Team and the Obersoldaten.
Which are better and why?
The obersoldaten are also double the cost.. and they both feature the same gun?
Weapon values are not based off the actual weapon, its balanced by the unit using the weapon, so you can have a weapon thats strong on unit and weak on another:
Rear echelons, rangers, and paratroopers all use M1 carbines but the rear echelons version is way worse than the other M1 carbines.
Ostheer Pioneers have much weaker Mp40s than the Mp40 assault grenadiers use, etc.
The mg34 HEAVY MACHINE GUN is actually one of the worst damage dealers in the game, (it deals like 4 damage per hit while suppressing stuff which lowers incoming damage so that makes its damage even worse so its only good at supressing)
while the obersoldaten light MG34 is arguably the strongest small arm in the game and can only supress once the obersoldaten hit vet level 4.