It would be difficult to choose which is the greater recording—this or Ponselle's. Not only is Boninsegna in exquisite form here—vocally and dramatically—but the recording itself is technically superior to her earlier Columbia version. Other uploads of this Edison test pressing are out of pitch. I've corrected that here and made my own minor enhancements to the sound.

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This channel is primarily about vocal emission—aural examples of basically correct singing, correct impostazione—chiaroscuro, vowel clarity, firm and centered pitch, correct vibrato action, absence of throatiness or thickness, sounds free from constriction and from the acoustic noise that accompanies it—with occasional video examples that demonstrate what the body, face, mouth, jaw, and tongue look like when used with correct impostazione—the vocal emission of the one and only Italian school.

Caveat: I'm biased in favor of baritones and baritone literature, but if you want to learn about and listen to all the greatest singers in the oldschool tradition, explore this spreadsheet (voice parts are separated by tabs): https://bit.ly/2W4qmE3