Prefer the Broncos.
I know the Bills should squish the fish in a January game in OP. Weather, track record, they're Allen's favorite team to play, etc. But there is something about the recent history, the teams knowing each other so well, and Miami's playmakers that makes me really worry the Dolphins are due to win a close game.
Just looking at the last 3 seasons since it has been McD vs McD, the Bills lost the first matchup and then won 6 in a row including playoff game 2 years ago. Of the 7 games 2 were blowout wins and the other 5 came right down to the wire. Even this year at home it took a personal foul on Poyer to avoid the fish having the ball w a chance to win in regulation and a 61 yard FG to avoid OT.