It is sort of interesting that P Manning was one of the best QB's of all time but not really that clutch in the big games, whereas E Manning was a solid QB (but as someone else pointed out above, no one would have considered him one of the best three in any year that he played over 16 seasons) but was very clutch in the big game when it arrived.
Just a little comparison. I would still want P over E but it makes for some interesting conversations at Thanksgiving dinner, I bet.