From what I have read and a quick conversation with Bob GRaham, it seems to be a slightly different flavor of sound, without one being truly superior than the other. The change from ceramic was due to the fact that a few customers dropped their arm wand and it broke, facilitating the new more break proof titanium version.
I thought about selling my ceramic and ordering a new titanium, but decided against it. Unless of course I decide to get a second armtube. Then I would buy the titanium and play with the new vs. classic version, depending upon which cart was a better match.
