Is a balanced XLR cable inherently less critical than a single ended RCA one?

I am currently using a completely balanced system. TT to preamp to amps. The cable from TT to preamp is inexpensive Mogami and the cable from preamp to amps is an even less expensive generic from Amazon.
I got the Mogami cable from the manufacturer who says that this balanced connection does not require an expensive cable and says the same for the other connection. IME with single ended cables, they make a very significant difference. Are balanced a different story?
Nothing is a different story. Except that with balanced you're paying a whole lot more for nothing in return. Aside from that though anyone says any cable anywhere isn't important is blowing smoke up your, ... well let's just say they're blowing smoke.
If you have properly designed balanced electronics, I completely disagree with millercarbon. Google "pints with Ayre" to hear the reasons they go to a lot of trouble to design their equipment as balanced. Mogami balanced cables are used in recording studios for a reason. Spend your $$ elsewhere.
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@tvad .
I have to say my experience mimics yours. I had some XLR's from Ralph Karsten that I have been using for years, but went with some new AQ XLR cables ( I have found their new cables work extremely well with my systems).
And, to be honest, I do not find a significant difference in sound quality. Which leads me to concur with Ralph, that XLR cables are inherently immune from coloring sound reproduction. To be fair, my system isn't set up in the best configuration. When I get my new subs, I will have my dealer do his best to optimise with what I have, and if it results in better sound quality, I will post accordingly.