Because since post-Spygate, who is the most-winning team in the NFL?Exactly. The league has done a great job of averting the catastrophe of having to explain how the Patriots cheated their way to a dynasty. We will never know the extent of their cheating, because the league burned the tapes, slapped the Patriots on the wrist, and let them keep their titles.
Manning is better than Brady.
Don't get me wrong, it's a close race.
I'd also say that Manning has never had to carry his team, but even acknowledging that, Manning is just that good.