Ok so after listening to a Mojo a while ago (I own a Hugo) I went out and finally bought one.
I am keeping both, as I used my Hugo a lot when outside the home, and the Mojo is much easier to carry around and charge.
What they both have in common is their unique musicality, and bringing music to life.
That last part, bringing music to life is not as easy as it sounds. For me average or mediocre digital sources have this "dead" (no emotion in the music) quality to them, but no Hugo or Mojo
Mojo and Hugo have that "stressless" sound (i.e. no listening fatigue) that I have only heard from vinyl and live music.
The common feature of the Hugo and Mojo is the FPGA which allows much better digital filtering which then renders the transient of music properly. It is easily heard when playing tracks that contain Piano, and also with fast rhythmic music, it latches on to the beat of the music, in a way I have only previously heard with hi-end expensive Naim equipment.
They both sound similar with some differences (Mojo is warmer and Smoother - Hugo is open and more detailed).
Obviously the Hugo has some advantages at a higher price (RCA connectors - for audiophile cables), longer battery life, slightly (to my ears- but dependent on taste some might prefer Mojo) better sound quality, Bluetooth, last but not least the very good crossfeed function but I am quite happy with the mobility and portability of Mojo.