The quality of soldiers belongs in another thread. Feel free to star up a thread on overall quality within armies, you might get some surprising answers.

As for accuracy; I really don't see the difference between the accuracy of a Garand and that of a Kar after you dump both of them in mud, clean them out with dirty equipment, then load them with military-grade ammo. Without a precision-made barrel and match-grade ammo, the accuracy difference under battlefield conditions is negligible.

A fairer comparison would be between the Garand and the Gewehr (spell-check). semi-auto vs. bolt action...no contest.