If ever there were 2 teams that were more evenly matched, this is it. Only difference I can see is for Seattle's offense to be potentially explosive. I agree with @Kurt that home field advantage is a big plus in a game like this, but Seattle has been playing much better of late and this just smells like a game where Marshawn Lynch runs amok. Seattle by 10 or more (but I hope I'm wrong...big time).
Problem for the Seahawks is that their defensive players are dropping like flies, there's no rotation like there was last season and that vaunted defense is playing very, very ordinary right now. Combine that with the average play of Russell Wilson and (aside from last week) the below average play from Marshawn Lynch (by his standards) and you have the crappy Seahawks team.
What a great game. I thought when the Chiefs drafted Dontari Poe in the first round (#11 overall) in the '12 draft it might have been the worst pick of the draft.