Buffalo's 1st team offense looked "OK" in the first game (scoring 3 pts), but have recently been struggling at training camp. Buffalo's 1st team defense is much improved and looked great in the first preseason game, gaining 3 sacks. Shawn Merriman won't be playing but Dareus should be a beast on the line.
Denver's 1st team offense also did not impress in their first preseason game (also scored 3 pts).
Even though both teams first teams will play longer, I don't see 20 pts being scored.