Doing some quick analysis on the rosters:
If you look at the raw stats, they look fairly evenly matched. But it is not until you bucket the players where you see the difference. In the 22-24 year old range, which would typically be considered "upper classmen" (assuming come from high school, redshirt, 4 years of eligibility), Mankato has 20 players in this cluster, compared to just 13 for Minnesota.
If you look at the "traditional" Jr/Sr ranks, Mankato has double the numbers. For men in their early to mid 20's, 2 years difference in age is significant in terms of physical size, strength and overall experience.
That is 2 full lines difference. You could clearly see it on the ice. Imagine if we had 2 full lines of Ben Meyer's level players.
26 and still playing college hockey? Enjoy it while you can, because you are probably at the pinnacle of your career.
I'm happy for Mankato, but let's be realistic about this stretch they are in. It is a combination of a perfect storm of the transfer portal, Covid extension and recruiting older players that have put them in the ideal position to dominate right now. Yes, their coach is also very good. Is it sustainable? Time will tell I guess.