What is the Catholic Church called?
Similarly, you may ask, what is the official name of the Catholic Church?
The official name of the Catholic Church is just that, the Catholic Church. The oft-used “Roman Catholic Church” technically (though rarely) means the Church of Rome. That is, the local Catholic Church of Rome, or the Diocese of Rome.
Keeping this in consideration, what is the difference between a Catholic and a Roman Catholic?
Technically, “Catholic” (when capitalized) refers to the Christian Church founded by Our Blessed Lord on the Apostle Peter, and his successors (the Popes in Rome); while “Roman Catholic” only refers to a Catholic in the diocese of Rome.
"Because of Mary's singular cooperation with the action of the Holy Spirit, the Church loves to pray in communion with the Virgin Mary, to magnify with her the great things the Lord has done for her, and to entrust supplications and praises to her.