Sauvignon Linestage Preamp or Joule Electra LA150

Has anyone had the chance to compare the Supratek SAUVIGNON Linestage Preamp-$US3500 with the new Joule Electra LA 150?? I'm using the EMM DCC2 as a preamp now and feel that either tube pre amp would give me more of the "harmonic structure" I know is still hidden in the music.
The current JE LA-150 is not a sweet sounding tubish preamp, where the SS will offer more of that type of sound.

Happy Listening.