Eh, what's the difference between 55 and 50. I don't really care. Some of those are converted to run TDs anyway. Manning has the #1 scoring offense in NFL history, whereas Brady is at #2 and #4 in history. (Your Vikings are #3). Randall Cunningham was up there in stats over Manning for a single season up until this year, if you ask me.
As for QB rating, Brady has a higher rating than Manning indoors, and a higher rating outdoors.
As for the MVP, no MVP other than Aaron Rodgers has won the award in a year when he won the SB in the first 13 years of this century. Brady won the MVP during two years in which he lost the SB. Manning has won it many times and lost in those same years.