Mojo 2 all the way.
It's the same case here in India Mojo 2 a little bit cheaper than Gryphon and it's the best seller.
I can't get my head around the logic of it!
Why would anyone need Bluetooth, a lossy wireless connection - to send lossy music to a top of the line headphone DAC/Amp, only to use a wired headphone to listen with?
Since the headphone cable can not be omitted, what convenience is there to not use a thin , tidy USB cable (they are available) to connect the phone to the Mojo or Gryphon etc. ??
One pays extra money for top headphones and top DAC/Amps, puts up with the inconvenience of a wired headphone, only to ruin the final sound by using BT! I don't see the logic of it.
There are plenty of decent BT earbuds or headphones about, that don't cost the earth - get one!
There
is the real convenience/point of BT - total wire free, not just a half-way house.
I have never used the BT facility of my Hugo2, nor my DX7 pro! Indeed, the antenna for the Topping is still in the box! And there
is a point to using BT on the Topping, but I rather remote control jRiver on my PC that is connected by Toslink to the DX7 pro. I am still wireless, but would get full resolution.