I used Belden 9497 and I update it by Duelund Sn-Co DCA16GA.
I use 16ga cable for both mid-base and compression drivers.
Despite zero break-in time Duelund cables sounded notably more transparent, more refined with much more low level detail. I also noticed more open and airy sound from Duelund cables. I don’t noticed a big difference in general tonal balance and vividness.
So @grannyring is right - cotton insulation is much better for SQ compared to plastic one.
The difference of sound between Belden 9497 and Duelund DCA16GA id very clear.
For me was much more difficult to compare Belden 8402 interconnect to Duelund DCA20GA because totally different tonal balance. Belden 8402 has more right tonal balance for my test.