During the pandemic, I listen a lot of Tidal music and try to do the gears comparison. Begin with the Dacs, Mojo vs X-Sabre (not Pro).
Headphone: Beyer T1.2
Amp: Beyer A2
Source: Macbook Tidal/ Audirvana
Testing Music: Parasite movie sountrack, ACDC top tracks from tidal.
First listening on Mojo: the treble is crystal clean, a lot of bass impact, seems very good, exciting, but after few songs, everything seems throwing to my face, very busy, hard to identify instruments from each other, not easy to sense separate layers. I can understand why people love Mojo, because it is so powerful, it seems detail but actually not, a lot of shading is missing, not very enjoyable for long time listening due to its busy presentation. It is good for movie due to its exciting nature though.
Next one is X-Sabre (original one not PRO), the treble is more rounded, not as exciting as Mojo but much relaxing, bass is not impactful as Mojo but it goes deeper, much easier to identify instruments from each other, air and layers are easy to sense, it has calm and relax presentation, very enjoyable for long time listening.
I think X-Sabre is a underated and overlooked dac. IMHO & JMTC.