Same experience here. Not only, with headphones cables, but all cables and everything responsible for carrying any form of signal. Starting with controlling vibrations of electric path. Because at the end, what you hear is electricity. Simple as that. Better material, bigger gauge, better geometric designs, better isolation are all important aspects for better conductivity and ultimately, sound.
I have the Meze Premium PCUHD silver-plated at the moment and the stock cable is absolutely no match. Much more clarity, details, space, separation and sheer resolution wilth the upgrade. But of course, the fact that I am now using the balanced output of my Fiio M11 Plus has an important impact also.
As far as material goes, I think the 109 will be more suited with copper cable because of their dynamic and sometimes borderline aggressive nature with some high energy music.
I found the silver-plated cable too energetic for the 109 in the +/- first 50 hours. Now reaching the 100 hours mark, I found the sound more balanced. But I still recommend copper.
I just order a Norne Drausk V2 18 AWG OCC copper. I will be able to compare it to the MEZE PCUHD silver-plated. I will maybe keep both if they are complimentary and can suited different listening mood.
I think you can’t go wrong with the MEZE Premium cables.