SP14/Don Sachs vs. Decware Zen Pre

I'm looking at adding a tube pre and I think there's a lot of value in both these amps. Problem is there isn't a whole lot online about either one.

Oddly the output caps value from each is wildly different for my power amp (Pass Labs XA30.5), 2.2 vs. 0.1 uF! Perhaps this is a difference in design?

I'm leaning towards Don's amp for a few reasons but the beautiful case and balanced design of the Decware is holding me back a bit.

Does anyone have experience or comments with either of these particular amps?