PinkyPowers
Reviewer: The Headphone List
@PinkyPowers, I would choose X3ii over GalaxyS4>Dragonfly1.2 anytime. (Unless you need the above mentioned advantages of X5ii.)
Of course, you can not hear major differences unless you use a really good pair of headphones. (Headphones should cost more than your player to hear what your player really can do... As a general approach.)
The problem isn't being unable to hear the difference, it's that there's a HUGE difference. The X3II sounds small and enclosed, veiled heavily, with very little detail or clarity. The Dragonfly is the exact opposite.

It doesn't surprise me that you would choose the DAP. Most would. It's why I'm looking for one. But I won't sacrifice superior quality for compactness. The Galaxy>Dragonfly fits in my pocket just fine. That's the defining criteria for mobility, after all. lol.