I suggest you read the third post in the Mojo thread to find out why Chord doesn't use balanced outputs. There is a lot of information there that pertains to the overall design implementations of Rob's DACs. The short story is that balanced output is a fix for an issue they don't have given the low substrate noise and excellent Current linearity of his DACs. Balanced output covers up these issues in other DACs. Also, more components in the analogue path reduce transparency so by having more analogue components to make the design balanced means less transparency to the source.
This link covers some quoted text from Rob regarding balanced:
https://www.head-fi.org/f/threads/c...pressions-thread.756029/page-30#post-12625641
Rob has said that the SE RCA is more transparent than XLR. The XLR out on the TT and DAVE may be of benefit depending on the attached amp's capabilities and the amps best operating topology, but not a benefit for the signal coming from the DAC, regarding transparency and measured performance, according to Rob.