I downloaded it and compared a few images in NX2, NXD and Lightroom 5.
NXD is pretty slow, but it's a beta, so I'd ignore that. I compared 2 images: an indoor flash portrait and an outdoor shot with blown-out overcast sky.
The indoor portraits were near-as-dammit identical in all three (NX2, NXD and LR5). They were shot with Standard picture control (no tweaks to the sub-controls) and I used Camera Standard profile in LR5, so I was comparing like-for-like. Skin tones, white point, overall lightness and contrast etc were virtually indistinguishable. LR applies
very slightly less default sharpening.
With the outdoor scene, LR's image-dependent treatment of highlights and shadows was evident. There was noticeably more highlight detail visible in the LR shot, and I couldn't get as much highlight recovery in NX2 even with manual adjustment. I couldn't find a highlight recovery tool in NXD, but maybe I missed it.
Edit: I posted example images at http://www.dpreview.com/forums/post/53205655