Gijinka are supposed to be humanized animals. As in, looking like a human that can live in the real world They can retain ears, tails, unique eye styles, wings, those kinds of things as well as keeping their color scheme and possibly something that looks like the original. They can also be inanimate objects as well like food, machine or other kind. Their skin doesn't necessarily need to match the skin tone of said animal/inanimate object.
Below is a Collection of what I believe a Gijinka is:
Now, Morphs on the other hand, are basically anthromorphs. They are still animalistic, but take on a human form. Or basically, Furry Territory. Basically, think of Sonic the Hedgehog and Zootopia.
I'm sorry this kind of irks me. When I think Gijinka, I think having human skin, color theme should match what I am making a Gijinka of and ears/tails/fangs/wings/unique eye style. I don't think Sonic the Hedgehog nor Zootopia designs. Just my two cents.