S&P+ has Boise ahead of WVU (I tend to think that S&P+ is the best...but that's a debate for another day). F+ (combined FEI and S&P+ has Boise one spot better than WVU).
All told, a reasonable person could argue that either WVU or Boise is the best team that BYU has faced this year.
Given where the game is going to be played and each team's relative strengths and weaknesses, I think that Boise poses more problems for BYU than WVU did (...and WVU posed a lot of problems...).
I hope that I'm wrong and we win going away. In my mind, a win will tell us more about how BYU has improved than it will about Boise being "overrated" by these objective measures (again--not the AP/Coaches poll).