As long as the Chiefs have Mahomes at Center and Reid calling plays, they are going to be in the ball game and win many of them...They were quite close to win those two games. I simply don't see the Chiefs falling apart and being behind by 4 games when they come to Orchard Park.
The Bills D has not shown that they can stop Lamar or Mahomes consistently in the playoffs. Until that happens, the crown remains with the Chiefs.