I just got the LADDER Schumann DAC and was really impressed with it. It sits above the Denafrips Aries 12th that I have for resolution. It seems to be a little more analytical sounding but is also very musical. I might even consider it against the Pontus II depending on what it is driving.
Right now I have the Aries 12th, Pontus II, Venus II, and the Ladder all doing a great job in my stereo and headphone systems. Using Lumin U1 and U1 Minis all with LPS. The are primarily running into Icon Audio, Woo Audio, Feliks, and AmpsandSound.
Have a Innuos Pulse Mini inbound to try as well as a PI 2 Mercury V2 streamer. Will check out the Gustard R26 as soon as able.
It's all about system matching!