There is a very large difference in fatalities per confirmed case:

https://www.realclearpolitics.com/coronavirus/country/united-states/

What is Utah doing so much better?

Why has Kentucky done better than Indiana,
but worse than Tennessee?

Since 45% of total Covid-19 deaths in the USA has occurred in the 0.6% of the population that lives in nursing homes and assisted living, a good part of the answer lies in how a state protected those infirm elderly.

Part of the answer lies in how hospital ICU’s treated patients.