This depends on the type of casualty.

Overmanns estimates that 5.533.000 Wehrmacht personnel died during the conflict. More than 4 Million of these died on the Eastern Front including fighting on German soil facing the Red Army. This would mean the statement is kinda correct for the deaths. But Wehrmacht soldiers were more willing to surrender to the Western Allies and the overall casualty proportions are different if POWs are taken into account.

Keep in mind there are no exact numbers and likely never will be. While German systems were pretty accurate the last months of the war were chaotic and numbers given by Overmanns and others are just estimations. I have read critics of Overmanns who challenged his numbers with reasonable arguments, this just shows that there is considerable debate about the casualties of WW2 especially on the Eastern Front.

I can't answer your question, but I have another one for you to ponder: What was the quality of the soldiers lost fighting the Brits and Americans as opposed to those lost fighting against Russia? German replacements were nowhere near the quality of those they had trained prior to the war and during the early years of it. It's easy to get lost in casualty figures without accounting for human capital.