BTW and FWIW, I agree with Mrtennis here in that better, in the end and for the very most part subjectively, simply means what you prefer. Objectively, it may mean the occasional repeatable measurements, such as timing delay or ringing or some other hard-and-fast parameter that can possibly be used to make a comparison. Note here that I'm talking about a repeatable measurement that can be done in, say, a lab...not so much simply a manufacturer's specification. But, the big problem with that is that if there is any such data, it can become too easy for the discussion of it to slip beyond what is routinely assotiated with them soundwise and cross into some twilight zone of hype, so you do have to kind of separate the 2 sometimes, or it can begin to be too much to wade through. Also, the better equipment you buy, the more difference 'better' cabling can make to one degree or another, but again, if you plan your system well, in almost every case it should not be necessary for the financial securing of the wiring to begin taking over the system, at least IMHO.
Good wiring is simply that which you, having tried it in your own system, can feel confident enough that it has let the best part of your system's sonic and musical potential come through. It may take you a few tries to get your bearings and make the gross-level kinds of comparisons, but even the mistakes you may make are bound to prove to be valuable to you. I know that may not sound all that exciting, but what I'm saying is you'll get there. But, when in doubt, experiment. Try something, even if it is just on a hunch. Lot's of audiophiles go to websites like the Cable Co. or Wireworld and try out their lending library for a small fee. That's a great way to begin finding your way around without getting soaked.