It’s also dead quiet on all 3 gain settings at any volume level. So they put some work into it. Tyll mentioned the Ultra Desktop amp should measure cleaner as the BUDA essentially has twice the parts in order to achieve true push-pull differential status. I think in the end even Tyll mentioned that balancing a headphone amp was more of a marketing gimmick that included cable upgrades.
More folks now understand the true benefits of going fully balanced which is nice, but in my experience balanced setups almost always sound noisier than single ended. There are just more possibilities for issues. Twice as many solder joints, components, and issues with impedance matching.