You use glitz to refer to something that is exciting and attractive in a showy way. the glitz of Beverly Hills. the exciting, attractive quality which is connected with rich, famous and fashionable people = glamour
Something that is glitzy is exciting and attractive in a showy way. Aspen, Colorado, one of the glitziest ski resorts in the world. exciting and attractive because of being connected with rich, famous, and fashionable people = glamorous