again if we go cons vs volks, volks upgrade cost more and is worse at long range doesn't give 1 more man, tech cost: 80 10 + 125 10 vs 100 15 + another 100 15 but later
But why are you attributing the 100 mp and 15 fuel entirely to volks? It is a part of OKWs tech cost that ALSO goes towards unlocking units. This is literally what I just said.
Meanwhile the soviet side-techs are for nothing other than those abilities. You have to specifically invest fuel into something that brings you no other returns, besides the 1 single ability. You cant say that about the OKW trucks