NOS sail panels

[chtr65]

I have seen some discussion on this site about the NOS and the reproduced sail panels for the 64-66 trucks. Could someone please discuss the differences between the two versions? I'am a stickler for NOS parts myself. Often paying much more for a NOS than a repo. I also know that sometimes the differences are very significant, to the eye, as well as fitment. But the difference in the two versions of sail panels is something I've never heard discussed. I would appreciate hearing from those of you that know the difference, if there is. Thanks in advance.