Same base material, but where did they go with it?

We have noted that even though the biblical account is developed along the same conversational lines as the Mesopotamian accounts, the interpretation of the account in Genesis is dramatically different from what we find in Mesopotamian tradition. It is clear they are in dialogue in the same cultural river, but Genesis takes a radical departure from the interpretation that emerges from the literature of Mesopotamia.—Lost World of the Flood, 179

<idle musing>
That's the final excerpt from this book. We'll start a new one tomorrow, from the New Testament this time.
</idle musing>