if you switch without smoke, it screws up fire concentration and either or both squads both focus down 1 soldier at a time which fucks up the tests. Always use smoke to make sure targeting doesn't happen the moment you switch but after smoke ends.
Redo your tests.
Did the tests again with mortar smoke, in Cons vs Volks at close range same results except that Conscripts (who had to turn their backs actually) were left with 2 men but roughly the same hp pool left.
Grenadier Squad Leader was defeated by cons.
The Volks vs Cons matchup consistently favours cons while the cons vs squad leader grenadier is a close one leaning slightly in favour of cons (since Grenadiers that win are left almost dead)
I'll post the screens soon