Vegas doesn't count...if they had been on the cusp of the top 3, they would have been in safely in as a higher seed instead of a bubble team.
Bottom line, BYU had 2 losses just like ND, both of their losses to a team truly with a top 4 seed in the playoffs. BYU had a much better SOS than ND....so yea, they absolutely can be in the discussion for comparison.