Are Hilton and Ritz-Carlton a group?

Hilton and Ritz-Carlton are not a group. According to relevant information, The Ritz-Carlton Hotel is a hotel brand owned by Marriott International, and Hilton Hotel is a hotel brand owned by Hilton Hotels Group. They belong to different hotel groups and have completely different membership systems. Ritz-Carlton is a luxury hotel brand, while Hilton is a luxury hotel brand. The Waldorf Astoria brand, which can compete with the Ritz-Carlton under the Hilton Group, is a classic luxury hotel with aristocratic temperament.