I have owned both. I started with the "classic" then moved up to the "Ultimate" which provided more bass and better imaging. Music seemed to have a more solid foundation with the Ultimate. Midrange was a bit more open and the highs were close between the two cables.Both cables were used on the PSM 1512 which I recently sold along with the cables due to downsizing my system.
The cables can typically be found on the used market. Also. the Classic Plus line are reasonably priced, even new.

