SQ difference XLR vs RCA ?


I’ve read lots of the discussions on this forum about balanced vs single ended connections.  My understanding so far is that balanced connection has better signal to noise than single ended, which helps if you have hum or noise problems or if you have long runs.  
My question is this:  if I have a quiet system with short runs, do balanced connections sound better?

mabonn

Balanced is inherently better. Well implemented it had definite benefits. 

Lowers the noise floor, much cleaner signal. 

<6 ft RCA by Cardas is able to make it sound better.

>6 ft, use Radial Rca to xlr converter , and sound like live music concert!

my video:

OMG, famous bands use this.Makes hifi 10x more realistic like live music venue concert.Radial ProAV2
https://youtu.be/69kvlFnsL5s

source=Apple Music lossless quality