Well, they haven't beaten USC at this point, so they can't exactly count that...
And honestly I don't think A&M, Louisville and Army are really that much better than Michigan, Washington and Nebraska.
It’s all moot if they don’t beat USC (and Indiana doesn’t beat Purdue), so comparing them really only matters if they both win…hopefully ND loses so it’s a moot point. But, with a win, their best wins are considerably better.
Looking at SP+ since it’s a pretty good indicator of the line, and allowing 2.5 points for home field, we’ve got (and
@Grant Green can tell me if any of these are way off, as I don’t set my own numbers for football)…
Texas A&M would be a 12.5 point favorite at home against Michigan
USC would be a 10 point favorite at home over Washington
Louisville would be a 9 point favorite on a neutral against Nebraska
Army would be a 9.5 point favorite at Michigan St
Notre Dame’s wins are considerably better than Indiana’s wins. Are they enough to offset the loss at home to Northern Illinois (vs a 3 TD road loss at Ohio St)? I easily think so. Others can argue against it. But it’s a pretty solid argument that ND has a better resume than Indiana and it has nothing to do with the name on ND’s Jersey.