Brady doesn't make mistakes, but Montana is the best QB of all time.
Good coaching in keeping the O-line up to protect Brady and when they're hurting like they are this season they change the game plan up and do lots of short passes with a TE and RB acting as extra blockers.
Manning might pull out a couple good games but his defense is winning it for him this season. I think they've scored 4 or 5 pick sixes this season. Two games Denver didn't score an offensive TD and still won because their defense scored points. Green Bat is 6-0 and haven't played a team with a winning record.
Some games to look forward to this seas will be Den-Cinci, Den-NE and Den-GB. I'm still on the fence with Carolina.