I forgot to mention in my comments on Tosca that while Adrianne Pieczonka has fine technique and a warm voice of ample size - certainly more than enough for the role - she doesn't sound at all Italian. Certainly this is partly owing to the fact that her Italian is on the loose side, lacking in bite - and so is her voice. It doesn't have the same kind of vibrancy or edge as an Italian spinto or dramatic soprano. I commented similarly on Heidi Melton and Stephanie Blythe in the Verdi Requiem. Excellent singers all, idiomatic in Italian, no.
Let's take a look at a few YouTube performances of the greatest of all Verdi arias, "Tu che le vanita," from Don Carlo, starting with Sena Jurinac. She sang many Italian roles in her long career, bringing to them deep understanding, a magnificent line, and pinpoint accuracy. But the weight of her voice isn't quite right, she doesn't have a strong chest voice, and the cool tone is more Strauss than Verdi. Still, it's an admirable performance, sorrowing and dignified.
Next, let's listen to a pair of legendary mid-century Italian sopranos, Renata Tebaldi and Anita Cerquetti. The cut of their voice couldn't be more Italian; both voices are big, rich, and vibrant, deep as a river.
Tebaldi is usually considered past her best by 1964, when this was recorded, but what I would give to hear the aria performed this way.
And here's the meteoric Cerquetti, in her very brief prime:
Missing from this collection, because she never recorded it: Rosa Ponselle, who sang Elisabetta in the 1920 Metropolitan Opera premiere. Now that must have been something, as young as she was. (And she was in good company, with Adamo Didur as Philip, Giovanni Martinelli as Don Carlo, Giuseppe de Luca as Rodrigo, and Margarete Matzenauer as Eboli.)