They’re probably comparable, but one advantage, no doubt due to our high costs, is that US hospitals tend to have a ton of resources and the latest equipment. This does make a difference if you have a condition that benefits from cutting edge treatments.

I recently had a family member get surgery for a life threatening condition where a cutting edge treatment greatly reduces complications. The equipment only exists in a small number of hospitals on the planet and their normal hospital, which wasn’t even a particularly fancy US hospital, had one. It's probably not an issue for small and rich countries though. Probably more-so for medium income countries.