Poll
18%
82%
Odin's powers are both magic and cosmic related.
Odin took down Surtur.
Odin has proven to be more powerful than Thanos.
Odin is super-humanly intelligent and wise.
Odin is a sky-Father. Sky-Fathers are powerful on a cosmic scale.
Odin has a goddamn eight-legged horse, two smart ravens and two immortal wolves.
A lot of Sentry's feats are hearsay. when he stalemated Galactus, we heard it from Spiderman. We didn't see it so we didn't know how hungry he was or what exactly "stalemate" means. If Spiderman saw Thor drive away G, he wouldn' have said, "using an Odin-enhanced Godblast, he beat up G!", he would have just said Thor whooped G. And we all know Thor isn't more powerful than G. The reader is robbed of context.
So Sentry's power may range from around Thor level, in which case Odin destroys him to Galactus level, in which case he beats Odin. If I had a guess I would put him in the former category and give the win to Odin.