differences between CAA uk and FAAor icao medicals

[md 600 driver]

urgent please
does any one know of differences in caa to faa or icao medicals
ie something like caa class 1 needs a ear test for for ir rating and faa does not
i am trying to compile a list so any differences would be gratefully received if fact any differences between caa uk medicals and any other icao country

thanks the more the merrier if you know the subsections please put down as it will save me time when checking