For simplicity, imagine Team A plays two teams each ranked ~#100 and wins both. Team B instead plays the #20 and #180 team and wins both. They both have the same average difficulty, but Team B has the more impressive resume.

Per Sagarin ratings, BYU has beat #100 (Navy), #102 (Troy), #95 (La Tech), #101 (UTSA), #56 (Houston), #119 (TX St), #108 (W Kentucky), #39 (Boise) and #205 (N Alabama) with a remaining matchup against SDSU (#79).

With the committee discounting the win over Boise*, that's basically Houston and a smattering of teams ranked around 100.

By comparison, Cinci has #171 (Austin Peay), #70 (Army), #126 (S Florida), #68 (SMU), #61 (Memphis), #56 (Houston), #96 (East Carolina), #22 (UCF) with a game left against #49 Tulsa.

Against top 25, Cincy is 1-0, BYU is 0-0
Against top 50, Cincy is 1-0 (with 1 remaining), BYU is 1-0 (with aforementioned caveat that committee views that one as a bit cheaper, probably more in the 50-75 range)
Against top 75, Cinci is 5-0 (with 1 remaining), BYU is 2-0 (and none remaining)
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*Note that I don't necessarily agree with this, but it's the reality