The pinouts are the same - it is just a matter of terminology. The correct terminology is inverting and noninverting. A true balanced connection means the cable is connected to a differential input. "positive" and "negative" come from the signs used for noninverting and inverting, respectively, in differential (balanced) amplifiers. Think about the schematic diagram of an op amp - an op amp doesn't have a positive input and a negative input, but rather an op amp has a noninverting input and an inverting input; the pins are labled with a '+' sign (noninverting) and a '-' sign (inverting). And the nomenclature comes due to the input stage, which is a a differential pair. So, in short ground = ground = shield; noninverting = positive; inverting = negative. Just keep in mind that the terms "positive" and "negative" when applied in this manner have nothing whatsoever to do with polarity.
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