I have been following this thread with interest. I have had an iFi Audio xDSD Gryphon for nearly three weeks now. I didn't know that Chord were going to release this new Mojo until I read about it at the thread on the Gryphon actually. So, I know that if I like the idea of the Mojo 2 then I can still return my Gryphon, I have up to 30 days before I am fully committed to it.
I suspect I am going to keep the xDSD Gryphon although there is a great deal I like about the Mojo 2. I really like what I am reading about the inclusion of the DSP in particular the cross-feed. I am a big fan of cross-feed for headphone DAC/Amps. I love xSpace on the Gryphon and in fact I use it 90% of the time.
I love the look of the new Mojo and I always loved the look of the old Mojo. The buttons on the Gryphon are probably a little bit better suited to me because I use a shoulder-bag always when I'm out doing things and the Gryphon has that big circular volume knob which is lit and so I can look down into the bag it is is so easy to see and locate. However this is a really small matter and I haven't ever tried out either the old Mojo or the new one.
The one big thing that is causing me to probably stay with the Gryphon is something that has surprised me by how useful it is and that is the bluetooth connectivity. This is just so useful when walking or getting the bus. The sound quality is noticeably diminished, but it is still really surprisingly good and enjoyable, leagues better than the bluetooth on my Audio-Technica ATH-M50XBT headphones. As I use an iPhone I'm using AAC of course.
So, when I'm out I also take the OTG cable and after doing various things for the day I love to sit maybe on a park bench or, if it is isn't too cold, at the promenade here in Brighton & Hove city or maybe a cafe and then I plug in the Gryphon and have really superb sound quality using my FiiO FH7 IEMs which are another recent purchase and for me are quite a revelation actually.
I have looked into the idea of using the Mojo 2 with the Poly. If my circumstances were different I think I would go that route, I'm thinking it would be great if I were working in a office or something perhaps and I would take the Mojo 2 and Poly with me each day and have my own ultra-cool sound system using the WiFi in the office. However that isn't my situation and I prefer the simplicity of just having the Gryphon with its bluetooth connection possibility for my iPhone.
So, all in all I think I will probably be sticking with my Gryphon but it is interesting to see how people are getting on with the really cool new Mojo 2.