Grand Hyatt, Hyatt and Park Hyatt, which level is higher?

Grand Hyatt Hyatt Park Hyatt has a high level. According to relevant public information, Hyatt, Grand Hyatt and Park Hyatt are all hotel brands under Hyatt Hotels Group, among which Hyatt is a five-star hotel brand, while Grand Hyatt and Park Hyatt are super five-star hotel brands. Park Hyatt, as a later opened hotel, is the tallest building at present. Park Hyatt has obviously improved a grade and should be ranked first.