Wet cappings verses dry cappings. It has to do with bee genetics, some races of bees place the cappings off the surface of the comb so there is a air space which makes the cappings white. other racer place the cappings on the honey and they look darker because of this. It has no effect on the honey quality or taste It just makes the comb look more desirable when it is white. In judging honey comb and frames of honey if 2 exhibits were equal in every way except capping color the higher points would be awarded to the frame with the lighter cappings.
That makes sense. You described pretty much what it looks like.