Simple test: The reports saying the UHC systems are better always are using statistical games. If they were really better why would they put their thumb on the scale?

Things like making 20% of the score "fairness"--as in UHC. And hiding the fact that most of the life expectancy difference is infant mortality and most of the difference in infant mortality is a reporting issue: infant mortality + stillbirth produces a far flatter plot. Thus much of the difference is whether it's considered to have died before birth or after birth.