Using differential or electronically balanced lines involves additional active electronic circuitry in the signal path. More active circuitry can never improve the signal, only degrade it, however slightly. That is why I always stress that unless you are running extremely long cables (well over 50 feet), go with the unbalanced connection if you have a choice.

Marketing departments love to pile on useless (or outright detrimental) "features" to equipment to make them seem more appealing.