Not really concerned about the noise or if XLR is better, the only thing I'm worried about is the quote again.....I've never heard of this before and don't want to only get partial power from my amp.
"The MEGAschino is a true fully balanced differential amplifier from input to output. It is essentially two amps for each channel, and one amp per phase. This means it really should be used in a fully balanced system.The manufacturer supplies an XLR to RCA adapter, but these should not be used. If a balanced connection cannot be used, note that the amp cannot be driven to full power from a 2-volt single-ended output, the limit of most receivers."