>>9504946As someone that collects this kind of stuff there are many reasons for why things were like that. We got the obvious things like warmth and better quality but as the war progressed things were slowly be made easier to produce with lesser quality materials. Many soldiers would choose to wear original issue items knowing that it was better quality. Very late into the war it was absolute chaos with civilians trying to find any resemblance of a German uniform to wear into battle. But if your asking about colour difference I would say materials and some aging as seen in your pic