The narrow diamond is usually played with short passing (due to players close together) and through the middle, which is why it usually works when 4-5-1V doesnt, which is a flank based formation.
The logic is true,but vice versa the game engine...4-4-2 ND is easily beaten by 4-4-2 classic,and 4-5-1 is counter-formation of 4-4-2 classic.