The same as between a Britisher and an Englishman, or if you wish, as that between the Jewish and the Mosaic religions. There is no real difference. The words Roman Catholic do not mean that there are other kinds of Catholics, but oniy that all true Catholics belong to that one great Church which has its centre in Rome. There are no Catholics apart from that one great universal Church. Those who leave that Church cease to be Catholics. At the time of the Reformation Protestants left the Catholic Church. They cannot leave it and belong to it. The only way they can be Catholic is to return to the Church their forefathers should never have left.
Radio Replies Volume 1 by Rev. Dr. Leslie Rumble MSC and Rev. Charles Mortimer Carty