Like I said, those are laughably and insanely flawed.
West Virginia ranks as the 2nd toughest schedule according to one site. But then the other site has them down all the way to 36.
Kansas is 5th on one, 29th on the other.
Ohio State is 11th on one, 31st on the other.
Texas Tech is 6th on one, 45th on the other.
Georgia is 3rd on one, 21st on the other.
The list goes on. There is far too much variance between results on these charts and their metrics to be taken seriously to measure legitimate strength of schedule.
One uses average opponent rank, which is based on their subjective ranking. The other uses opponent's win percentage, which while objective and factual, skews to teams with horrible records, because they are contributing more significantly to the overall win percentage.
For instance, Colorado had the 2nd toughest schedule based on win percentage with .6483 and 94-51. Compare that to ND's .5779 and 89-65 overall record. The problem is that Colorado contributed SIGNIFICANTLY more to that overall record, by virtue of going 1-11. So their opponent record/win percentage takes a MASSIVE nose-dive when you remove their contributions, to 83-50, a .6241 percentage.
Meanwhile, ND went 9-4, so that actually improves the percentage. Win record becomes 85-56, a .6028 percentage.
Yet, according to this measure, ND's SOS was 38 spots worse than Colorado's. When in reality, removing their contributions, we're talking barely over a 2% difference in overall win record. That percentage is the difference between 2nd and 6th or 7th, not 2nd and 40th.
So, yes, Colorado played a tougher schedule than ND, but not nearly a third of the sport better.
At the end of the day, how many games against winning teams did ND play in 2021? 4. How many did they play in 2022? 7. How many of those were away from Notre Dame. 2021? Just 1. 2022? 5.
Pretty simple to see that ND's road was significantly tougher in 2022 than 2021. I'll gladly take opening the season against a bad Florida State team and finishing the year with 7 games against non-winning teams over opening the year on the road against a playoff-bound Ohio State team and ending the year with 2 other NY6 bound teams.