Coax or RCA question?

I would guess the Marantz has a better DAC… so I would start there.  Then after you have a lot of hours of listening switch. 

The one that sounds better.

Thank you @ghdprentice! That was my thought as well but Integra is the higher end of Onkyo. So I wanted to get some opinions/advice from the experts here. The problem is I truly have to turn into a contortionist to make any tweaks in behind my rig. It really sucks so I really try to “get it right first time” LOL! Thanks for taking the time to respond😊!

The Marantz has both digital and analogue inputs so you can use both at the same time and switch on the fly and get direct comparison.