I have no clue either because I usually don't breed starters together and even when I do such as with the special baby there is no way to tell if one of both kittens passed it's hidden fur and the other it's Genesis why it is not easy to figure this out.
It seems each year they make a new Genesis Fur for KittyCats' birthday which is rather confussing for breeders I think eventhough I understand they like to do that.