Well, my neighbor had 4 golden comets, at least that is what the feed store said they were, and they were all varying shades of orange. Two had the white underneath, one was almost rust colored, and one was a light rust with a darker rust head and hackle feathers, almost like a cape, and no visible white undertones that I saw. I wish I had a picture, but I don't, sorry.
I have a golden comet. She is one of the best egglayers I have. Layed right through the summer heat. Her egg is darker than some of the cuckoo marans I've seen. Very sweet personality too. I'm definitely getting more next spring.