One can compare it to its immediate neighbors (Finland, Denmark, Norway) and get your order of magnitude right there. Norway: 206 deaths, population a bit over 5.8 million. Finland: 199 deaths, population a bit over 5 million. Sweden: 2,355 deaths, population a bit over 10 million. I'll let you carry out the division yourself.
Comparing to its geographical and cultural neighbors helps deal with differences in city structure, public health system, trust in government, population density, etc.
You’re comparing apples to oranges here - Sweden is pursuing a narrow tall spike before getting to herd immunity, and Norway and Finland are trying for a looooong shallow curve. The area under the curve is what counts, and we won’t know those numbers for months.
All of these European countries are more similar than different. What we see here is significant data that contradicts the conclusions in the article. In other words, it is possible that Sweden's policy is working.
Comparing to its geographical and cultural neighbors helps deal with differences in city structure, public health system, trust in government, population density, etc.