[dkh]

I wish there were a quick/easy answer here (we all prefer would to read those) but the truth is that it's not that simple. Even among the nations with excellent universal healthcare systems, most differ from each other in pretty significant ways. This is in part because no two countries are the same, and every detail can have a big effect on what system would work best for them. There are certainly stats-friendly ones about population, economics, and politics. But there are also equally-important ones that are cultural and harder to quantify--for instance, in some countries the people have a distrust of doctors, or a cultural aversion to visiting the doctor unless absolutely necessary, and that factors into the best design for that country, based on how it would be used.

What I can recommend is a great book that compares all the systems, through the lens of an American with the same question you have, called The Healing of America by T.R. Reid. Highly recommended.