Between "The Devil and Kate" and "Martha" which has more acts?
Martha (opera) Martha, oder Der Markt zu Richmond ("Martha, or The Market at Richmond") is a "romantic comic" opera in four acts by Friedrich von Flotow set to a German libretto by Friedrich Wilhelm Riese and based on a story by Jules-Henri Vernoy de Saint-Georges.
Don Quichotte Don Quichotte ("Don Quixote") is an opera in five acts by Jules Massenet to a French libretto by Henri Caïn. It was first performed on 19 February 1910 at the Opéra de Monte-Carlo.