I should also add, that in either case you're not actually listening to Roon, but Roon and MM through different inputs (streaming module vs digital coax inside the Oppo) on a mass market device. Try something far superior, like a Bryston BDA 3.14 operating with Roon, and your experience will be much better.
I don't think I'd call the Oppo 205 a mass market device. Are you aware that used prices on this go for more than the BDA or the BDP (sometimes combined!)? There's a reason for this.: it excels in pretty much everything it does, complete with a Sabre Pro DAC chip they used 7 years ago that still being used in current devices...and HDMI 2.0 ports that the BDA doesn't even have. But it does have a little bit of digital glare I've noticed from the implementation so I'm trying to find just a little standalone DAC to clean that up.