I have bought Mojo without any chance to demo. Well, glad I did
Did the same, and I was really blown away, even with my "not-so-hot" B&O H6 Gen 2 headphones.
Yesterday I listened to a new track, kind of jazz-club atmosphere, minimalistic, with singer and people in the audience talking, and several times I took off the headphones instinctively because I thought there was someone around me.
(I found it as free download: "Cowboy Junkies" engineered for headphones)
Then there are friends who don't immediately hear a big difference.
I could more easily describe the effect like a photograph.
iPhones take amazing photos in a super convenient, ultraportable package, but they appear somewhat fake. If you look closely the colors are distorted from over saturation, the edges have halos from oversharpening, the skin on people looks waxy from noise reduction.
The SQ from the Mojo is like the same image taken with a much better camera and lens, and processed with a very detailed, natural presentation, much higher resolution, preservation of the textures, the dynamic range, the 3 dimensionality, like a fine art color print. You can dive into that sound image, explore details and detect nuances that got all lost in the iphone photo, and it all feels so real!
Of course, it is still an image, but what a difference!
Happy Mojo owner here