Rosenblatt was a great chazzan, and was also a good frum Jew. Kvartin was also a great chazzan, but was not really frum.
I once heard that someone asked, “Who is better, Rosenblatt or Kvartin?” The response was, “On Rosh Hashanah, Rosenblatt is better. On Yom Kippur, Kvartin is better, because he drank some water to loosen his throat while Rosenblatt didn’t.”
So the question was asked, “If Kvartin sounds better on Yom Kippur, why does Rosenblatt get paid more?” The response was, “Because he davens 2 shemoneh esreis, one quiet, and one loud. Kvartin only davens one, so he gets paid less.”