thanks for your response, but I'm not giving up on this one yet. A few more arguments to consider are the following one's.
Luthardt was wearing at his RKT-award ceremony, under the EKI a wounded badge in black on the right and an infantry assault badge in silver or gold on the left. On the photo's of Remer, he is wearing a wounded badge in silver or gold on the left, on the same place as this unknown one. When looking when he received those, it was 1939, 1940, when he was still an Olt. So can this be an old uniform vest, or a later added RK?
Then there are still besides the difference of the nose, also the ears of Remer, which are open wider. I don't see any photo of Luthardt, on which his cheekbones are that wide and then rapidly dropping inward to his temples, while I see that same characteristic with Remer.
Allways open for another opinion, or information unknown to me,