What are the premises? It's pretty clear that the writer intended the Germans to have the same amount of war material as the Allies (which, in itself, was impossible). However, is he also talking about the same Intelligence, Logistics, and Strategy?

It's important to note that Britain had turned every single agent within England. Had the British known about this massive troop concentration in Normandy, they would simply have called D-day off. And, considering that a sizable portion of troops would have to be present in France, the Russians would have faced less opposition.

Of course, the war would be longer. But the first atom bombs were slated to be dropped on Germany, not Japan.