XLR vs RCA


What are the differences? Is one better than the other? Always? Sometimes? The CD player I'm purchasing has the facility for XLR, but I was told by my friend who heard the player, that it sounded better with single ended. His feeling is single ended usually wins in coherence and musicality. Feedback, as always, would be appreciated. Thanks in advance,
warren
warrenh
Ernie, the Pass Aleph products aren't truly balanced, are they? I mean, single-ended was sort of the raison d'etre of the Aleph line, wasn't it?
I believe the Pass Aleph line used a single gain stage in a fully balanced configuration.
I believe that Pass uses double single ended stages for each channel to create a true balanced system.
My mistake. The Aleph 3 did not have XLR inputs though. But the others did.