I asked whether we were going to hear what both sounded like and was told no. I then asked whether the designer of the other amp might not have thought that THD was all that was important. The audience all groaned. I left.
Like THD which is easy to measure, I don't think capacitance is all important.
Tbg
The only reason capacitance could be important is if a cable design had lots of capacitance and it was used in long runs between preamp and amp or between phono cartridge and phono step up.
Too much capacitance can cause high frequency roll off but to determine one would need to measure cable capacitance (which varies by length) and input and output impedance of the associated equipment.
I had one instance were a long run of MIT cable decidedly rolled off the highs in my system. Fortunately that was long ago and MIT has changed design countless times since then, that problem is non existent now.
I do not know the capacitance of High Fidelity Cables but I'll bet Rick could tell us with one phone call. He's one of the nicest guys in audio and about a straight up as anyone I've ever met.