If it can be agreed that the tower of Babel story is a myth/allegorical tale does that not suggest that Noah probably is too.
Even the motivations of the characters in the story seems to come from a very different canon/continuum from the Noah story
(I'm a huge comic geek, these sorta things come up all the time in comic book discussions, when u have loads of different writers and editors these things are inevitable. For comparison sake the main line marvel continuum [where Spiderman etc you would recognise are from] is Earth 616 - that's a lot of Earths and it's to accomidate the amount of conflicting timelines that occur in modern writing even with a big team of very talented writers)