According to the critic Michael Scott, author of The Record of Singing, Ancona's smooth, fluent and refined method of singing pre-dated the verismo movement.
Ancona also undertook roles composed by Leoncavallo (Silvio and Tonio), Puccini (Lescaut and Marcello), Mascagni (Alfio and David in L'amico Fritz), Giordano (Gerard in Andrea Chénier), Mozart (Don Giovanni and Figaro) and Wagner (Wolfram, Telramund and even, on occasion, Hans Sachs).