Given that all religions arose from differing cultures, political and economic system and climates, it's not - or should not be -surprising that they differ.

About the only really common element you will find nowadays is some version of the Sky God - because as far as I know, no human culture has ever lived exclusivley underground.

The other element that should be common is the Earth-Goddess, but the poor old girl has taken such a hammering from patriarchy that you barely see her anymore!