Denafrips Ares II vs. Black Ice Glass FX Tube

I currently have a Denafrips Ares II DAC that I have been extremely happy with, but I I finally could no longer resist ordering one of the last remaining Black Ice Glass FX Tube DACs (with the Psvane tubes).  When I purchased the Denafrips this was the other DAC of interest.

I really don't have any expections for which one will end up sounding better in my system, but R2R vs. tube should be fun.

Anyone else compared the two side-by-side?