You are correct but the one thing you have to keep in mind is that if the circuits within the component(s) are not balanced [as in this tube amp] and you use an XLR, you are not making any difference whatsoever. At that point, you are basically using the XLR cable as an RCA with absolutely no added benefits.
In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence.
The best way to enjoy digital music reproduction is to never listen to a good analogue reproduction.