Under the BCS, every single game is important as losing the BCS is often catastrophic when it comes to qualification for any of the subsequent Bowls. As such, the playoffs mean that regular season games become less relevant as winning and losing only has an effect on seed and qualification becomes a lot easier. Further, BCS builds up the need for an undefeated season for certain teams to be able to qualify.  As such teams are more likely to give everything to every single match during the regular season under BCS, unlike in some leagues where a clear winner will emerge very early on and not have to play nearly at 100% capacity in order to win the conference overall. [1]  [1] Klosterman, Chuck. “No college football playoff, please.” ESPN. 01/02/2007