I am glad if you find this thread useful. It is almost 10 years behind the curve, i.e., after the fervor that started with Mr. Shirokazu Yazaki of Spec Corporation, when their vision of "real sound" was reported on by PF reviewer Jeff Day in PF Issue 78.
Mr. Day was subsequently introduced to the Belden 8402 cable used as an interconnect and vintage Western Electric tinned copper wire used as speaker cable, by the folks at Spec Corportion, and then he introduced us to it in PF Issue 81, plus a series of Jeff's Place articles, where he documented his conversion to using the Belden and WE wire in his personal system. Mr. Day eventually migrated to using Duelund wire, after they jumped on the bandwagon by offering various tinned copper in oiled cotton bulk wire/cable offerings.
I previously made cables from the 8402, WE, and Duelund wires, and I found the 10awg WE wire particularly useful for making power cables (either single or doubled up for 7awg!) and I later learned that Mojo Audio power cables have used that wire, as well as Triode Wire Labs American series power and speaker cables. I believe the Duelund wire was sort of a fad, although it does provide a reliable source of tinned copper wire and does away with the inner plastic insulation of the WE wire, which was good for power cables since it was actually rated for voltage.
The IC cables I have made from 16 awg WE wire, and 20 awg Duelund wire, sound pretty good but I like using manufactured wire for ICs because you benefit from the uniformity of the manufacturing process (i.e., frequency of winding and the uniform use of packing/damping materials).
I am listening to the 8428 interconnects right now, which, as I posted, are constructed slightly differently from the 8402. The two main differences are the wire gauge which is 18awg for the 8428 (20 awg for 8402), and the additional cotton wrap directly in contact with the conductor wires in the 8428 cables. I do have 3 pairs of 8408 cables on the way here, which are constructed exactly same as the 8402, except the wire gauge is 16awg vs. 20awg. I suspect as you go larger in wire diameter the result may be a bolder, harder-hitting, but maybe thicker sound. The cables I made from 16awg WE cables displays those traits, but not necessarily in a bad way. I cannot speak to the different termination methods as all of my cables are balanced so the braid shield is connected to pin 1 at both ends. I suppose I could connect the shield only at the source end but would then need to add a spiraled ground wire outside of the cable as I do with the DIY WE or Duelund cables - too much work for no significant benefit. I will probably eventually be passing off my two, 2M sets of 8402.
In comparison to the 8402, I would say the 8428 might display a bit more body overall, and deeper, harder hitting bass. I find clarity to be pretty good, at least in my system and the 8428 cable seems to be at least as well balanced across all frequencies as the 8402.
All of these cables seems to sound midrange-centric, where the body and tone of the mids are displayed as the most important features of whatever you are listening to. Some say the result is rolling off of the extremes, but I wouldn't necessarily go there. They sound pretty good, until I find something I like better. As I said previously, the test will come when I reinstall my Furutech u-P2.1 (19awg OCC copper in foamed PE) interconnects.