What they did differently was widespread testing, contact tracing, and strict quarantines of the infected … you know, the things doctors were saying everyone should do and the things you would have advised everyone do in a hypothetical pandemic prior to 2020 when conservatives deliberately weaponized the virus for political advantage. Their obesity rate is 2.1% vs. the U.S.’s 41.9% … as you were shown
here and
here, that explains only a small portion of the disparity. Their life expectancy is 75.4 years, vs. 78.8 for the U.S. I don’t know about comorbidities but since they have public health care they likely have a healthier population and reaped the benefits of that policy difference.