You should win either way, but it is just 1 win.
At seasons end, the win total is the same, as was the number of "winable games" but SOS could be 5 spots different because rather than playing a really bad team you played a terrible team.
Compound the problem for BYU because there seems to be 3 or 4 100+ ranked opponents each year.
In short, our SOS could be 75 or 55 but the games BYU should have won could still be the same.