I've played both and the major difference for me is WW2 has never crashed on me when playing large formation campaigns. This was the first reason I switched and have stayed. There other minor differences but all and alll WW2 meets my needs far better.
__________________ Eternal War(gaming) PanzerBob
"Whenever in future wars the battle is fought, panzer troops will play the decisive role..."
Heinz Guderian, General der Panzertruppe