2 loss P5 teams may have an overall stronger schedule, but number of key wins should be approximately similar if they end up losing 2 games.

Take Alabama as an example. If they were to lose to say Auburn and LSU, they would have the following resume building wins:

2 wins against very good teams (Texas A&M & Ole Miss)

4 wins against decent, but not top teams( Florida, West Virginia, Mississippi St., Tennessee)

4 wins against lower level teams (W Carolina, Florida Atl, Southern Miss, Arkansas

BYU would have

2 wins against very good teams (Texas & UCF)

2 wins against decent, but not top teams( Houston, Boise St,)

8 wins against lower level teams (UCONN, VA, USU, Nevada, MTSU, SVSU, CAL, UNLV)

So, Alabama would have 2 more wins against decent teams, but I doubt a reasonable person would say that is enough to overcome an undefeated BYU team with a couple of key victories and no losses. It is just plain difficult to go undefeated in division 1 football, not to mention that we are playing @ Texas, @ BSU, & @UCF. Most of Alabama's victories would come at home.

I have no idea if I put those teams in the right tiers and Alabama certainly plays a few more marquee names, but I think BYU is in good shape to be an at large team this year and could definitely jump potential 2 loss P5 teams.