We usually do not realize that the Torus power transformer is much more that just a mains transformer - it includes a third coil connected to a network. This clever system eliminates noise from mains without contaminating the ground line - a patented development of Menno van der Veen, also know for his high quality designs of output tube transformers. See http://www.google.com.gi/patents/US6087822. After reading it I remembered of the egg of Columbus - it looks so logical!
We can expect that such system would react to grounding systems differently from other type of conditioners - IMHO only experience can tell us which way to go.
Yes I am aware of the claims by Torus (Menno) in this regard but have not done the comparison to an off the shelf isolation transformer. My guess is a large part of the benefits observed would come from any large local transformer (Equitech or otherwise) cleaning up the mains and sinking noise from components through its virtually nil output impedance (along with the large instantaneous current and, of course, a good grounding scheme). Torus uses very good quality (Piltron) transformers and add ons like voltage regulation and Menno cleanup certainly don't hurt. All I know is it works.