So, I spoke with my friend in Japan and he auditioned the new CKN70 in Tokyo today and compared it to the sony and new jvc models and he liked it more. He couldn't give me detailed impressions as he's not into describing sound and that glossary but he was a trumpet player for years, so he supposedly knows good and accurate sound. He wasn't impressed with the cable though.
Well, I can believe your friend without knowing him because I've have the CKN50, and it's one of the best sounding universal IEMs I've heard in a while. This has nothing to do with more bass or more treble or anything like that. It's just a nice sounding IEM with more of a balanced sound than anything. It has just enough bass and highs, but the mids are beautiful.
Yet, the cable drives me crazy on the CKN50, so unfortunately I think your friend is right about the CKN70's cable, and that will probably stop me from buying the CKN70 anytime in the near future. I think I'm going to be satisfied with the CKN50, and now I'm an official owner of the CKS1000 (which is growing on me fast).