I think there's two things true here. First, Indiana's success is of course going to be the envy of every college football team that's been trying to turn a corner or get over the hump. I don't think Minnesota is alone in being one of those programs.
But, secondly, I think Minnesota is a bit more unique in a few regards. One is that Minnesota did have history as a football power, and has been trying to reclaim it for decades. It's not just a sense of 'they could do it so why can't we?' It's more, 'We've done it before, why can't we do it again when Indiana just did it in one go?'
The other piece is it's not just Indiana. The Hoosiers are the latest in a string of Midwest/Big Ten football programs that have reached major heights, in Indiana's case the mountain top, while the Gophers have struggled to climb up, only reaching 10+ wins twice.
Wisconsin with Alvarez/Bielema/Chryst, Iowa with Fry/Ferentz, Michigan State with Dantonio, Missouri under Gary Pinkel and now the Hoosiers in the last two years are all nearby examples that such a project can work at non-Blue Blood Midwest schools. Even Illinois, going to a Sugar Bowl and a Rose Bowl in the 2000s, along with the solid run Bielema has them on now counts.
Obviously Indiana set itself apart in that it won the national title, and the rest all varied in overall success. However, all of those programs won division titles, conference titles, had multiple 10+ win seasons, went to/won BCS/NY6 bowls and regularly finished ranked.
Minnesota fans and the team, in the same conference/region, also existing as a major university program in a premier conference with a storied football history, has had to watch all of that while clawing for success, and Indiana's rise just feels like the cherry on top. That's why I think it does sting a bit more.
On this point, I do agree that 2019's run was more impressive, because of the strength of schedule, on top of having one more victory. In fairness to the 2003 squad, though, if looking at raw talent, I think the 2003 team is up there overall. They had the roster to beat Michigan and Michigan State that year, but as we all know nothing is won on paper.
Since 2000, though, I still think one of the toughest schedules where Minnesota still finished with a winning record was 2014. Like 2003, that was another one where the Gophers (mostly) beat the teams they should've, many with losing records, while falling against the stronger opponents. However, there were many good teams on the schedule.
- TCU, finished 12-1, Big 12 Champion, Ranked No. 3/3, Won Peach Bowl
- Ohio State, finished 14-1, B1G Champion, National Champion, Ranked No. 1/1, Won CFP
- Wisconsin, finished 11-3, B1G West Champion, Ranked No. 13/13, Won Outback Bowl
- Missouri, finished 11-3, SEC East Champion, Ranked No. 11/14, Won Citrus Bowl
The only bad loss on that 2014 team's schedule was against Illinois. But I think had they played a schedule more akin to 2003, or even what the 2016 squad did, they probably win 10 games.