No. Seeding based on win %. If KC wins on Saturday, they will be #1 seed. Not shared.
If Buffalo also wins this week, and meet KC in championship game, game not in KC but neutral field.
There are more wrinkles as to other teams, but If Buffalo ends up 1/2 game behind KC and both reach championship, game at neutral field.
Conversely, our chances of being the #2 seed as opposed the #3 seed went up as we did not have to beat Cincy.