A Quinceanera is a similarly-themed celebration that celebrates the Spanish and Latin traditions of a girl’s 15th birthday, which is typically when she is thought to go from a girl to a woman. The Quinceanera differs from a sweet 16 party the most because the Quinceanera centers around the tradition of a church mass. Also, the “court” of the queen’s friends and representatives are more formal than the gathering of friends at a sweet 16 party. The formality overall of the party themes, color, and festivities are more pronounced for a Quinceanera as well (source).