I've ordered the ADL mini-mini cable which is cryogenically frozen (whatever that means). So far my finding of all the copper based IEM ranging from some fancy DIY to oyadie 3.5 to some cheap 5 dollar one is sound wise they all the same however the cheaper one suffer from poor shielding and in rooms where there are lots of cable going around they will hum (the ortofon cable) where as the oyadie one is silent as it gets.
If I ever upgrade my IEM cable it will be for ergonomic reasons I do not see myself buying things which I have to be more careful as my own body part.
Furukawa (ADL) makes good cables. They're the first company to really push OCC technology to the mainstream; but yes, like you mentioned, the biggest difference between cables is the shielding.
FYI, though, their new alpha-OCC is silver-plated copper, while their old PCOCC-A (that's no longer produced, which sent manufacturers like Sony, Oyaide, etc. into a massive scramble) is pure copper.