If two players have exactly the same skill level then what?
As I literally just said, it's entirely dependent on what that equal skill level is.
You see a lot more Ostheer now than OKW at higher levels, indicating Ostheer is generally considered the stronger pick by the players that are best at the game.
With some 1v1 map OKW will capture 80% of the map before CP3 when soviets can bring Ppsh. Soviet MG just cannot stop Volks and Strums. Sniper is too costly and risky. CP only advances if there is a fight or upgrade. So necessarily some conscripts have to be sacrificed and it makes the OKW units veteran quicker. Then it becomes even more harder to fight back a veteran Volks or Strum.
Again, only true at lower levels. By Rank 400 you've got competent sniper micro and once you get to the top ranks sniper use becomes so good it can decide entire matches. The Maxim has a fast setup time which makes it quite strong offensively but its smaller arc demands a higher level of micro to use effectively. Maxim spam was a viable strategy before SBP revived OKW Mechanized tier. Conscripts beat both Volksgrenadiers and Sturmpioneers early on if they have the favourable position and vice versa.