There seems to be a facegen problem...their faces & hair are all exactly the same with a very generic look. When you remove the armor their heads are darker than the rest of the body.
First I forgot to say that they have apachi hair female, about the skin I don't know, did you try make new facegendata with CK, removing temporarily before launch CK the folder tintmask from \Skyrim\Data\textures\actors\character\character assets? I use Demoniac skins, don't know if it can be the cause.
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I use Demoniac skins, don't know if it can be the cause.