The success stories among the Nordic countries are Denmark and Norway, not Sweden. Denmark closed down early, is now opening, primary schools have been open for a month.
Denmark has 537 deaths (0 today) Sweden has 3529 deaths (115 today)
It is highly likely that there is little difference in the infection fatality rates amongst countries with similar health care systems.
The single biggest factor seems to be the deficiencies is their old-age and long-term care facilities.
It is also highly likely that anti-bodies will provide immunity until there is a significant mutation.
There are some countries that are already worse than Sweden, before even starting to lift their lockdown and restarting their collapsed economy.
Countries that were highly successful in preventing the spread, and if they can replicate this success until there is an effective vaccine, will end up doing better than Sweden.
When the dust settles after Covid-19 is eradicated, I suspect that Sweden will be somewhere in the middle of the chart.
The differences between a running economy and a collapsing economy will take several years to quantify.
This will start to become clear when CERB runs out soon, and when eviction halting orders are lifted and massive numbers of people are several months rent in the hole.