"Looking for a bigger soundstage, with a more defined yet impactful bass/subbass". both accomplish this. ISN C16 is warm and bass heavy compared to both. i like 210 bass even more than 175, but they are near. quite detailed bass textures, way tighter bass than C16. boosted bass of Kanas Pro gets benefited of this bass cleanliness surely.
"I wish for a bit more detail and soundstage in the highs". both accomplish this, big difference compared to C16. in this regard, 175 is the clear best, although 210 is very good as well..
Thanks very much for the info, hakuzen! Always honoured that you share your expertise with us here on headfi. I'm going to have to keep both cables in my Ali cart a little while longer though. While waiting for your response, I ended up pulling the plug on a Radsone ES100 on Amazon.ca for a birthday gift to my son when he turns 18 in January. I am already gifting him a KXXS that I won from BGGAR on his 11/11 raffle, as well as an upgrade Nicehck C16-3 cable and some eartips. It wasn't until last week that I was told that his phone doesn't have a headphone jack, so I had to scramble to find something that he can plug his new gear into. So I bought him an ES100. But now, there's not enough money left over to buy a new cable for myself. It's no big deal. Aliexpress has sales all the time, so maybe around Boxing Day I will be able to afford cable 175. For now, my kid comes first.