If the boy and his brother represent Cain and Abel from the Bible, what do Pozzo and Lucky (and Vladimir and Estragon) represent biblically?

When the boy visits Vladimir and Estragon for the first time, he says that Godot treats him well, but beats his brother because his brother does not respect Godot as much, which represents the story of Cain and Abel from the Bible. So, do Vladimir and Estragon just represent all believers in religion (as a mock to religion), or do they represent a specific story (this can also relate to the tree of knowledge)? Also, are Pozzo and Lucky representative of a biblical story as well? What tie do Pozzo and Lucky have in terms of religion?