On the pregame show they went over the scenarios, if both the Jets and Bills finish 10-6, assuming the Jets lose to NE, the Bills have the edge.
Plus, look at it this way, the law of probility is against the Bills if the Jets make it in. What are the chances that both WC go to a team in the same division? Pretty slim.
So we better root hard for NE and (gulp) St. Louis.