Some sample photos here:
https://www.dropbox.com/sh/npju26xck...LB3Aro41a?dl=0
Naming system - test photos 1 to 4, N = Nexus 4, O = Oneplus X
So 2NHDR = 2nd sample / Nexus / HDR on
Thoughts:
One Plus X has wider field of view
Better in "normal" mode
Focus time is much improved over Nexus 5 (in limited testing)
One Plus X produces overly saturated HDR images, I prefer the more neutral tones of the Nexus 5 in this regard
Overall it's a definite step up in camera quality, although quite how it compares to the big boys I'm not sure (presumably considerably worse?)

