The QB has a much wider effect on a game than any other position and is thus measured more on team performance than any other position. Other offensive skill position are generally gauged almost solely on production. So, no I don't think Peyton is better QB than Brady, but I certainly think Welker was a better receiver than Edelman is.
I think there's a legit argument to say Peyton is a better passer than Brady, but not a better QB. For QBs, winning matters.
Thus far, you're the only one who has claimed that.