Peter, as usual there is a tendency to go around in circles (at 33, 45, or even 78rpm LOL) in these threads.
I have heard a range of the top belt drives, incl yours, and Kronos and AF (latter two only at shows).
I've heard the TW AC3, Brinkmann La Grange and AMG Viella V12 at length and in multiple occasions, incl one of these in direct a/b comparison v my current choice at home.
I'm also intimately familiar w the Linn LP12, Roksan Xerxes X and TMS2 and 3, again at dealers and in my home.
So, I have a reasonable idea of the similarities and differences.
If opinions can only be made by forensic side by side comparisons, at home, w the same ancillaries, in the analog field, then no conclusions are ever going to be likely.
I maintain my strong opinion, that the uber high torque of idler inherently brings thru the heft and substance of music more explicitly and convincingly than the belt drives I've heard.
In the live music I've been fortunate enough to attend recently, the visceralness of the lower mids and upper bass I most hear from idler/rim and also high torque DD.
Now, on the flip side, the solidity in idler presentation is mitigated by some less transparency thru those mids, and so ultimate trailing of notes, low level micro detail, high end shimmer is somewhat curtailed w idler.
For me, this is a compromise I'm happy to live with, that idler/rim high torque verve getting me IMHO closer to the gestalt of "the note", and closer to the musicians' intentions.
IMHO, YMMV etc (obv, as belt drive rules 95% of tt topologies).