Or, for a more direct comparison: https://i.insider.com/5e9d6a5015ea4b315c0b4d0a?width=1100&fo... (from https://www.businessinsider.com/how-sweden-and-norway-handle...) - Sweden's population is 2x that of Norway so keep that in mind when comparing, but the difference is really apparent.
To the extent their new case burden remains flat and their medical system capable of treating cases as they arise (which they seem to be) then they are meeting their objectives.
Their goal was never "pretend its not happening and hope it goes away" -- and it certainly was never to have fewer cases than neighboring countries -- so it seems a strange way to compare them. Their goal isn't zero new cases, either. With that said, a flat case count is certainly positive and totally compatible with their goals, which makes it IMO a fair axis of comparison.
If other countries do succeed in containing the virus, that means travel in and out of Sweden will have to be restricted in that time frame, and death rates will have been higher (and not just a deferral effect).
Since some countries apparently have been succeeding in containing the virus, I don't think that is a good bet to make.
Some islands. Those, naturally, have well-defined borders due to their being surrounded by water. I'm not sure any non-island nation has had any luck.