I’ve not heard the S.C. version but from what I understand, the super capacitor version is supposed to be battery powered like in its operation. It’s supposed to remove the AC from the circuit and provide clean steady state power to enhance the sound. I suspect it will add a touch of sweetness to the sound much like other battery powered preamps that I’ve owned.
I still desire to get current (no pun intended) Jeff Rowland gear. It’s absolutely wonderful.
Welcome to the forum!