The number you're citing for Stockholm is from April, well before the outbreak became severe in Sweden. Cases in Sweden continued to grow after that, and didn't peak until late June, when daily case counts were 3x higher than in April. (Although it's important to point out differences in testing - the positivity rate peaked April 20th - 26th).

That's a different experience than Madrid, where the virus hit much earlier. By the end of April, daily case counts were 1/5th of their peak in Madrid.

I'm not aware of a more recent study.