Graham's elegant musicality and delicately sensuous voice empitomize the modern approach to singing at its very best, just as Sembrich's seamless legato, preternaturally clear attacks and crystalline purity of tone sum up the aesthetic values of the Edwardian era.
Aside from the obvious fact that Graham is a mezzo whereas Sembrich was a lyric coloratura, the major differences are mostly a matter of expression. Graham uses her voice for expressive purposes, deploying subtle variations of dynamics and phrasing in order to arouse emotion. As a result, she sometimes compromises her attacks, tastefully allowing herself small liberties that would have been considered unacceptable a century ago. On the other hand, Sembrich's voice is expressive in itself: the sound of her voice, the perfect phrasing, the masterful legato are enough to move the listener, and no extraneous effects are needed (indeed, they would probably detract from the splendor of her performance, which seeks to communicate a very late-nineteenth-century, and very French, vision of the beau idéal). Of more modern singers, only Sutherland and Caballé have adopted a similar approach.