Throw out the regular season game between those two as a point of analysis. Playoffs are a whole different animal.
Remember what Talib said last season when asked about the Rams defensive shortcomings? He brushed it off and said it doesn't matter in the playoffs, and then the Rams D went out and proved him right, playing great three games in a row.
As for the rematch aspect of it? Well, I remember in 1979 the Rams had a road game at Tampa Bay and got their asses whipped good. They went back to the same stadium for the NFC Championship, pitched a shutout, and advanced to the Super Bowl.
Again, playoffs are a different animal. Go Pack.