The other day I was browsing in a local record store and I found two
Callas's recordings of Bellini's Norma: the first one is in mono sound,
recorded in 1954 (Mario Filippeschi/Ebe Stignanini/Nicola Rossi
Lemeni/Tulio Serafin/EMI Callas Edition), and the other one is in stereo,
recorded in 1960 (Franco Corelli/Christa Ludwig/Nicola Zaccaria/Tulio
Serafin/EMI Callas Edition). Price of the first set: about US$ 26.55.
Price of the second set: about US$ 38.15. Which is the best one?