Thanks! Very interesting observations!
"..
.it seems to have a slightly artificial/etched quality to it..." I also feel like that.
Have just compared David Elias "Crossing" in DSD (free download) on the R3, Cayin N3 and Chord Mojo.
The R3 background is more "black" than the N3, and I certainly like that.
R3 bass is punchy, treble is very clear, approaching a little sharp.
A little bit like an iphone photo - processed to appear sharp, bold and saturated.
Kind of matches the screen
The Cayin N3 feels more natural in comparison, not as "clean", not as "bod" but less processed.
And the Mojo anyway is the king of smooth, clear and warm/natural and still detailed.