Keep the mojo, I was surprisingly disappointed in the dfr after all the write ups. It has a very poor low end, sounds thin and bright for my personal taste. I'd try the dfr before selling the mojo. Good luck.
Any of You people compared Audioengine D3 to Dragonfly Red ?
I am running both units this evening A-B, and very suprisingly (to me) found Audioengine D3 to be soundwise superior, faster, airier, livelier.
Bouncy and lively bottom end in comparison.
To my ears (admittedly with Denon AH-MM400, bassy cans - to my AKG K701 ears) Dragonfly Red does Not sound thin or bright in comparison, it does not lack the amount in bass, nor weight. It is just less lively, more laid back, less expansive in comparison, less dynamic. It feels somehow more narrow as well. Less air by a good margine in comparison to D3.
Biggest advantage with the Dragonfly Red with IDevices might be that it only requires Camera Lightning Cable, so the phone can be charged at the same time. D3 can run of the Iphone only with usb hub as power source, according to Audioengine.
So, for mobile purposes - Dragonfly, as far as I know (do correct me here), but soundwise, to my ears, Audioengine, with same source material of the MacBook Pro Retina.