if we were to use Galactus once more as the raised bar, I would say that Odin has a great chance of winning. Just consider how well each of them did against Galactus. I think Odin may have done a smidge better.
Ben death was under the command of te in betweener.
Galactic wasn't because he was the opposite of in betweener
Seeing that Odin would be at a disadvantage in this situation.
__________________ Quotes from Hia8:
"I claimed that the science is sometimes faulty."
"You don't understand. This is fiction. That means none of this stuff really happened."
"There is no writer to purposely ignore a character's natural ability just because it suits the story."
"in some cases because the writer knows that Character A will dominate Character B easily and refuses to allow this to happen for the sake of the story."
In-Betweener is an Abstract entity. He's simply higher up on the cosmic food chain than Odin. Odin has no chance of winning barring significant significant prep time and help.