I like to think Set's form is emergent and takes whatever form you want see, or a group of people want to see. Set sort of emerges from the chaos, and that's what his image does for me, sometimes I see a dog, sometimes an anteater and so on. I think the Egyptians probably imagine that the world is always emerging from the primal chaos, it's not something that simply occurred in the past, and it's up to us what we make of it.
Set was the god of Libya and was at war with the "good guy gods" in Egypt, so one has to assume the civilization based in Libya would be were we could correlate the answer -- and we have the contention that the Sahara has grown since the early days of Egypt, so its possible the definitive answer remains buried.
if you right click and open the images in new tabs you'll be able to see them because the unfortunate blue background will be gone. in B4 "i don't see that in reader mode"
the Set animal has a snout that is more bird/reptile-like. the ears are a cipher.
Set was the god of Libya and was at war with the "good guy gods" in Egypt, so one has to assume the civilization based in Libya would be were we could correlate the answer -- and we have the contention that the Sahara has grown since the early days of Egypt, so its possible the definitive answer remains buried.
With regard to differences that could be explained by stylisation and the lack of familiarity due to it's rarity in most of Egypt.
the Set animal has a snout that is more bird/reptile-like. the ears are a cipher.