Sonically speaking (and this is a very subtle difference to be able to discern for most folks, if at all), the best things to study with cable differences is the overall reactive profile, similar to how you would with a driver's reactive profile. Once you get past the obvious runs/resistance thing, you are left with; dielectrics of the cable sheath, skin effect for the gauge of conductor, type of conductor element (copper, aluminum, silver, etc...), the purity and alignment/density of the crystalline structure of these elements (less airspace between the actual copper crystals), and the the reactive components of the cable (impedance, inductance, capacitance) due to it's construction (fancy twisting of multiple tiny strands with perfect dielectric materials covering each strand, flat cross section, things like that, etc...). When you shift the balance in favor of high capacitance or high inductance in a cable, you can impact the sonic signature. Some amplifiers will not tolerate high capacitance cables but the ones that will, sometimes allow for a small change in character that many find pleasing. Same for the conductor type, some like the way silver sounds and some do not. It's all part of the bigger picture and how you are matching all your components but I would not even bother with any type of cable purchase or cable swapping until it is the very last thing you are trying to do to make some minor improvement. The difference it makes is just too small and can only be appreciated when so many other factors have reached utter perfection. Otherwise, the change it could potentially make is simply masked out by other numerous factors. For most people this exercise in switching cables to experience a gain in clarity or depth is pointless unless you have truly achieved something special with your other install parameters, such as careful equipment selecting and pairing. Bigger differences can be heard with the introduction of a tube preamp, or op-amp swap, or EQ adjustments. But to be clear, there are sonic benefits that EQ adjustments cannot achieve, that some cables and constructions can actually provide. But again, it's one of those Nth degree things that only a handful of people will be able to say that they can hear a difference, and with any conviction.
Short story is to just buy quality copper cables of sufficient gauge and sleep good knowing it was the wise and frugal thing to do.