The very nature of such questions introduces so many imponderable and subjective ramifications that you begin to spin your wheels pretty quickly. At its most basic you are comparing strategies based on widely different levels of logistics and support. Air power is certainly the most important of these - with allied domination of the air everything from production to movement of troops and supplies to actual battlefield engagements changed. Knowing that, how would you compare German generals at any level with their allied counterparts? As for me, I still think the Germans were the snappiest dressers, but you have to admire the British for their wellies and casual pheasant hunting attire.