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.