It's the same formula for the Patriots that we've seen for 20 years, short passes on offense, don't take many chances, decent running game, win with defense and by not making mistakes. Even with Brady, the only chances the Patriots took downfield were the TE mismatches with Gronk and Hernandez. With the exception of when they had Randy Moss. Jones doesn't challenge down field much at all and the NE defense is playing well. It's allowing Jones to be ultra-conservative and have success.
As to Buffalo, Allen has a lot of wow moments, but also is the most inconsistent of the top 10 quarterbacks. Lots of variance in his play.