When we're into the connector debate (XLR, mini XLR, RCA) for balanced audio, it may be worth mentioning that there is even another option: RJ45.
http://www.studiohub.com/PDF/completeliterature.pdf
Interestingly, the brand new unbalanced to balanced converter from Sonifex has this option:
http://www.sonifex.co.uk/cmulr1/index.shtml
It would be quite nice to see if measurements favor one connector over the other*. Remember, XLR is from an ancient time where we tolerated more noise, while today's big data centers rely on RJ45 . Because Ethernet cables and RJ45 are mass produced to tight specifications - while specs are non-existing or lax in audio - one shouldn't rule out that RJ45 is the better (and cheaper, more flexible and user-friendly) connector choice.
And there's more: Mass produced low-cost Ethernet cables with tight specs, which means for example it's always 110 Ohm, are excellent for analog signals. In other words: If you wanted the best cables for your stereo, you should use Ethernet cables throughout with RJ45 connectors**. This isn't going to happen anytime soon in hifi or even pro circles, so this is more of a DIY issue.
*The only places I've seen connector measurements are here:
https://www.gore.com/sites/g/files/ypyipe116/files/2017-01/Designing Ethernet Interconnect for High-Speed Data Transmission - White Paper - Military - 111816.pdf
and here:
http://www.neutrik.com/zoolu-website/media/download/15427/Test+Report+-+etherCON+NE8MX6
**I also thought this AES note may be of interest for those who consider Ethernet cables instead of AES-EBU cables (see page 19):
https://tech.ebu.ch/docs/tech/tech3250.pdf