Het reds are a visual incomplete dominant morph. They are not the regular "het". Red axanthics are the super form of the het reds.

Looks wise they resemble the green pastel (think cinnamon and black pastel) and tend to do similar things in combos. At least from what I have read. Another similar morph is the Lace Black Back I believe.

Sadly I do not have pics, hopefully someone who is working with the morphs can shed more light on this for you, as I am just relaying what I have read.