Director David McVicar’s new production brings opera’s favorite double bill to new life, setting the two operas in the same Sicilian setting, separated by two generations. Marcelo Álvarez takes on the rare feat of singing both leading tenor roles. In Cavalleria, he is Turiddu, the young man who abandons Santuzza (Eva-Maria Westbroek) in his pursuit of the married Lola (Ginger Costa-Jackson)—and ends up being killed in a duel with her husband, Alfio (George Gagnidze). In Pagliacci, Álvarez is Can...