I am pretty sure you have two seperate MMRankings for them.
So If you played a lot Soviets, you get generally better at the game, you see your German opponents Strategys and can use them, you know what good against Soviets. Therefore you will easylie win most of your Games as Germans.
Same for me as a mostly German Player, I win most of the Games IF I play with Russians.
I don't feel like Pgren Spam is strong... Flamerscoutcar/Snipercar/Sniper or Maxims are all pretty good against Pgrens. Also Mg42 is pretty weak against the same thing: Snipers, Scoutcars and Maxims (setting up infront of a MG43 with a Maxim still the biggest joke
