Same cable is used on the W1 Pro, W6 Pro, and DM10. It's a good one for sure. Oh! And I forgot to mention. The W6 Pro uses MMCX, not DC as I was expecting from the preview pics online. Worth the buy for a well-built, inexpensive MMCX cable, though the memory wire kinda sucks.
The DM8's cable is actually a step up from the rest. It's even more plush and flexible while retaining thickness above the y-split. The rest taper down quite a bit leading into the ear pieces. Tradeoff is poor strain relief at the y-split and jack on the DM8.
I think they're worth it for under 10 bucks, pending this signature is what you're after. They're not bass shy in any way. Bass isn't particularly authoritative either. Everything about them seems to be pretty mellow.
Not sure how you'll feel about the DM10. If the VJJB K2S had too much mid-bass, get your EQ ready is all I can say
My QKZ collection so far;
DM8
DM10
W1 Pro
W6 Pro
W1 Pro is probably still my fav followed closely by the DM8 (Edit: DM8 might be my fav actually...so tough to choose!), then the DM10 with the W6 Pro pulling up the rear. They're all decent sounding but the W6 Pro is the only one that feels cheap, outside of the cable. Poor build and the worst driver flex ever (you can hear it while swapping tips). Thankfully they sound fine, so I'm planning to get another pair to see if they're better built. DM8 has amazing build quality for a cheapo. Feels like a tank. Sounds like a cross between the KZ ZS1 (original) and ZN1 Mini; ZS1 bass with more prominent mids and treble of the ZN1 Mini. Big soundstage. Love it.