What high quality source? This is nothing but an old blog post with nothing to back up said statements.
Benchmark does balanced, did you even read the article? Chord also does balanced. Benchmark's HP4 Balanced Amplifier is their best measuring amplifier in terms of SNR and also their flagship - which is kind of ironic isn't?
Benchmark themselves recommend balanced between devices.
SE is has less noise than balanced. But SE has a design flaw and that is that the low shield can in some instances connect multiple unit chassis' and cause a ground loop hum. Balanced has more noise, but usually deliver four times the power or even more compared to SE and has reduced interference. SE can deliver as much power as balanced, but that requires unlimited voltage which is usually never.
It is all about implementation!
Balanced isn't magical and makes everything sound better, it usually increases SNR and has no interference. Balanced XLR is very satisfying to plug in and feelings are a big part of this hobby.
Higher SNR = Louder = Sounds better for a lot of people. I'm curious to why that actually is.
I would normally cite sources etc. but I'm sure you're able to find test that can prove proof of concept.
Hopefully this made things clearer.