With audioquest cables I’ve heard, the sound is slightly warmer and a bit more dense. In theory, rather than in practice, a cable shouldn’t make a difference. Some argue this difference with AQ cables is due to picking up noise/acting like an antenna. And it’s true that most kinds of distortions can create warm over/undertones in a music playback system.
But cables do make a difference. Go for silver-plated copper, or silver interconnects if you wish to place the least strain between the amplifier the the load (speakers) This is due to the higher conductivity and lower resistance of silver/plated cables.
Some say silver or silver-plated cables are harsh or dry sounding, but instead they are are acting as more of a "direct connection" vs cables with lower conductivity, such as regular copper. PCOCC copper is a nice alternative to silver/silver-plated cables.