Hi Joe: I listened to a bit of Dalli many years ago, and, like Armando, I did hear some similarities in his and Lanza's colouring. But I remember being turned off by the obvious attempt at copying Mario's way with a song---"Beloved," for example---as well as recording material associated with him (songs from "The Student Prince" and the like). Even Dalli's pose on the album cover was an obvious Lanza imitation. Much of this was probably at the behest of Dalli's recording company, but it's a shame he wasn't encouraged to be himself.
At one point, there was talk of Dalli playing Lanza in a film version---an odd idea, since Dalli spoke with an Italian accent. (Even John Coast thought that Dalli would be a suitable choice.) I'm glad it didn't happen, as presumably it would have been Dalli's singing voice on the soundtrack.
Like Steff, I do hear occasional similarities in Domingo's voice (not his upper register, though!) to Lanza's---and just in the upper reaches of Wunderlich's singing
here, he reminds me a little of Mario.
Interestingly, one of the vocal coaches who worked with Lanza in Rome on, I think, the
Caruso Favorites album, told Armando that Mario's timbre was "vaguely" reminiscent of two celebrated earlier tenors (whom the coach had heard in person): Miguel Fleta---the Spanish tenor who created the role of Calaf in
Turandot---and Francesco Merli, whom we were discussing a few months back
here.
Cheers
Derek