I was using a BiFrost multibit as the DAC, haven't heard the other Uber pieces. But I think the Fidelio 2 has great synergy with the Vali 2. It's a really pleasing sound, can't say if it's better, but it's addictive listening to that combo in my second setup with the Fidelio 2. I think it's definitely more engaging than the Fidelio/Asgard combo. HE400i/Vali 2, not so much.