I used to think they were about equal - Tom winning big in the playoffs, but lacking in stats and Peyton putting up monster numbers, but unable to perform in the playoffs.
But, in recent years, Tom has been every bit as good of a statistical qb that Peyton ever was and he still has all of those superbowl appearances / wins. I get that Tom had a great defense in his early years, but he was so cool under pressure and really played well in the Patriots system.
With a win two weeks from now, Tom will have a resume that could easily have him going down as the best qb in history.