Hi, i got it from Watchinternational, not a TD here but in another forum.
It's not a 1:1 and the obvious being the movement which is an Asian 21J, and the side engraving of "PORSCHE DESIGN" and "P'6780". The Rep has a much thicker engraving than the gen, and it was painted black instead of colorless in the Gen.
This is based on what I gathered by comparing with the pic of Gen. However, I have not handled a Gen therefore unable to comment on the materials.