Well, I've spent a week going back and forth between the Canare 4S11 cables and the new SC4. Both are in bi-wire configuration Both use WBT-style bananas on all ends, although the ones that come with the Bryston cables strike me as better quality. No way to compare the materials used, though, since I simply don't know.
In favour of the 4S11: higher SPL at the same volume setting on the preamp. This doesn't make the least bit of sense to me, especially since the SC4 is a 4 x 12 AWG cable compared to the 4S11's 4 x 14 AWG and the SWC4 is a 10 foot pair while the 4S11 is 12 feet. But I keep noticing it. Perhaps the SC4 adds less to the sound, that is, alters the signal from the power amp less in which case there's actually less "information" being transmitted by the SC4 with the result that a higher volume setting is required to achieve the same total SPL. If not that, I'll just have to remain mystified.
In favour of the SC4: Pretty much everything else! Deeper more clearly articulated bass; less bright, but at the same time more detailed HF (e.g., percussive metal sounds like cymbals, tympanis, gongs, cowbells); less sibilance on vocals, especially female vocals (love that Azam Ali!); more vivid transients; better separation of different instruments, i.e., quieter, more "delicate" sounds less "swamped" by louder sounds.
Now I can move on (or back in time) and compare the SC4 to the Bryston-Vandamme cable. One problem there is that the Vandamme is single wire and the SC4 is biwired—and I'm not about to reconfigure the SC4.
[Associated equipment: Technics SP-10MKII on davinci_redux birch plywood plinth (thanks again, Leon!) with Jelco SA-750E tonearm and Reson Reca cartridge; Perreaux TU3 tuner; Bryston BCD-1 CD player and Tascam CD-01U/Lavry Black DA10 DAC; Bryston BP-26MC; Ayre P-5xe phono stage; MC2 Audio MC750 amplifier; Tannoy System 15 DMT II speakers; Torus RM15; Mogami 3107 for all interconnects, digital and analogue, balanced and single-ended; DIY power cables (Carol 12 AWG for sources/preamp; Carol 10 AWG for power amp and Torus); isolated ground AC receptacle (requires 4-conductor wire) on dedicated 20 amp feed.]