Bits is Bits... So neither has an advantage as far as sound quality goes. I use both without issue, only because I have only so many inputs on my DAC. The ONLY difference here is the DAC itself. Simply go with the one that sounds better to you.
Personally, I prefer RCA because the mechanical connection is typically more robust and even the cheapest cords can transfer the bits with 100% accuracy.
Personally, I prefer RCA because the mechanical connection is typically more robust and even the cheapest cords can transfer the bits with 100% accuracy.