It’s comparing two regions: Denmark and the Oresund region of Sweden, that are
1. Of similar population size
2. Of similar density
3. Of similar culture
But where Denmark implemented strict social distancing and quarantine, the Swedes followed a laissez faire approach.
Sweden has three times as many deaths as Denmark.
Sweden is about 10% Moslim.
Denmark is about 5% Moslim
That makes a big difference in cooperation.