It isn't even about the rings, it's about the way they've played in the biggest games. It's not like Manning has lost two Super Bowls because he defense couldn't hold the lead (that would be Brady). So absurd how people make it sound like the plucky Peyton Manning did everything he could be the team let him down. Brady has answered the bell so many times in the postseason and Super Bowl it is hard to keep track of all of his heroic comebacks, last-minute drives, and overall clutch play. Likewise, it is hard to keep track of all of Manning's failures- not team failures, but Manning's personal failures- when he needed to step up in the playoffs and SB and either couldn't move the ball or threw a backbreaking INT.
Back in 2005-06, I really thought that eventually the "clutch" factor of Manning and Brady would even out over time, as it was a small sample size. Manning won his Super Bowl because his team dragged him (3 TD, 7 INT) to victory. I figured maybe he would now at least get over the hump. But after he "won" his Super Bowl, the clutch play has been even more one-sided towards Brady, it hasn't even been close. Brady has put the team in position to win three Super Bowls during that time; Manning has continued to gag and falter. In his two Super Bowls, two total choke jobs, albeit in different ways. On the second half of their careers alone, Brady extremely clutch, Manning extreme choker. Add the first and second halves of their careers together and the picture shows this isn't just an anomaly.