medical requirments/comparison
FAA medical standards are based upon medical and health facilities provided by the government to all citizens in general.
So it becomes easy for FAA to have simpler fitness tests since all the citizens are well taken care of by the medical setup.
So comparison is not workable because ICAO states have lot of variation within itself.
Some ICAO states have very good health system, some are far behind.
Under such circumstances ICAO states are having different medical check requirements based on the medical setup in the country and aviation requirements.