Once everyone understands and accepts we are talking about American men, north and south, and yes there were some cultural differences but they were really the same breed, so to speak, of men. Common sense dictates that those who had more battle experience were going to perform better, generally, than those that did not have as much battle experience. The South may edge out their Northern foe on that one issue the first few years of the war but then throw in most all other factors such as arms, equipment, larger supply of fresh troops, etc. in which case the North had the advantage. As the war progressed the edge grew larger and larger for the North.