In 2008, the Patriots lost Brady...and went 11-5 with a total schmo at QB.
In 2001, the Colts lost Manning...and went 2-14.
In 2001, the Patriots got the chance to beat the Rams in the SB because Adam Vinatieri made a 45-yard FG in the snow to force OT with the Raiders in the Divisional Round.
In 2005, the Colts failed to force OT vs the Steelers in the Divisional Round because Mike Vanderjagt missed a 48-yard FG indoors, in perfect conditions.
No NFL coach has ever cast the regular season/playoff aspersion on Manning. Only fans and talking heads on TV. People who know, know better.
In games with the greatest possible stakes between them (AFC Champ.), Manning 3 Brady 1.