Fedora Barbieri and Cecilia Bartoli, mezzo-sopranos born on June 4, could not be more diametrically opposed from a vocal standpoint. Unlike the past few articles showcasing two birthday-sharing singers together to see how their careers feature numerous similar roles, this article, which features two Italian mezzos, has none. At all. Bartoli and Barbieri never sang the same roles. They only have {…}