He certainly has the silbertonen of the words in the lied and he makes this, as with so much that he sings, deeply personal...a sort of direct from him to us. Thankyou zwanzigjahr.
Sure, but this is actually the tenor version of this song. A baritone could sing this in the original key, but would probably also choose to transpose this down (DiFiDi would certainly do so when singing the Schwanengesang), a bass had to do so, after all, the song goes up to high G even in original key.