Aldnorab,
My sound comparison is from my previous configuration (Node 130 to Denafrips Pontuss II DAC), and prior to adding a Denafrips Iris DDC in between the two units.....and as you know I think highly of the 2.0 USB
Slight improvements from Supra 2.0 USB to Excalibur USB:
(1) Darker background/quieter
(2) Improved vocal detail and quality especially on female vocals in general but more specifically when Auto-Tuned
(3) More and better detail in highs, most noticeable on cimbles, harmonica, acoustic guitar....greater clarity, without being sibilant
(4) Sounded just a touch "faster" if that's a correct term? Just sounded a little more purposeful in presentation
(5) Didnt' do a lot for sound stage, where I thought the standard USB was really good