As has been said, knowing exactly how many cases anywhere has is tricky due to the different approaches to testing. However, if we take even Sweden's number as gospel they've gone from 19 cases to 6000 in a month and therefore the there is no reason to think that the amount of cases and deaths will not explode over the coming month. They'll be lumbered with making the exact same choices we are, and quite frankly I'd be incredibly surprised if they do not bring in bar and restaurant restrictions or something akin to a lockdown over the next couple of months. It's a very likely scenario to happen.
I think that is when we will know a lot more. In a month or so, if Sweden follow the same path, we will have a much better idea of which method was right or wrong. I don't really see a way of knowing for sure either way until then.