It's important to note that there are discrepancies between countries in how the deaths are reported. Interesting read regarding unexplained increases in the number of deaths in some countries here: https://www.nytimes.com/interactive/2020/04/21/world/coronav...
The argument wasn't that fewer people would die. It's that everyone who was going to die would do it sooner. The Swedish gamble is that this is an unstoppable disease that will go to completion in every country anyway.
Those numbers are impossible to compare because countries are one different points one the infections-per-capita scale which is not know to us because we can't test all the population all the time.