I'm always wary of the "different" sound that is not "better."
I bought an original because I was doubtful about how much a difference a power cable would make in my system, and didn't want to outlay so much money for a signature as a trial cable.
The usual break-in period passed with my noting the apparent ease of the sound of the original.
So I began reading about the signature, and thought the upgrades discussed made sense.
Both the original and the signature "do no harm." Both have a natural and easy sound from the beginning.
But the signature's mods touch the heart of the upgrade, and appear to me to work so naturally that whether I looked at the bass, the highs, or the mid-range, everything was more open and musical.
I listened to them with Indian ragas, Tudor choirs, chamber music, symphonies, pop, and jazz. The signature is better than the original in a way that I find remarkable.