I chose to have this filler and the fitter would fit either type and have a certificate at the end of the day the filling point is fixed. There is no mention in the reguletion about useing a country specific adaptor.
I didn't want a big hole cut in my car so chose this option. As said I have used this type on a jeep with no issues.
Alot of these things are recommendations by assiciations and not law. If its legal in Europe I would like to see it being challenged.