A37575
I don't know where you were during the war, but those of us sitting in air raid shelters east of Sheffield could certainly tell the difference between a Heinkel or Dornier and a spitfire or Defiant.
German bombers did have desynchronized engines and were quite distinct.
There is a world of difference between the sound of a Merlin and a Jumo or Daimler-Benz.
Bob C