Stephen,
I just looked at your samples and it is a very nice documation of the product.
Why is the consumer camera look better? I remember from high school photograhy class that a very good lens is a pin hole in aluminum foil. No aberation, everything is in focus. But, it takes a lot of light. Consumer cameras are basically pin hole lenses. Making a real lense that works well over a zoom range, an aperature range, and across the xy grid on the screen is extremely tough. And it takes compromises to make them inexpensively and small, lightweight, watertight etc. It looks like they picked some trade offs aimed more at blow and go journalists who are covering breaking stories like huricanes or roaming on a football field while it snows.
The 70 appears not to be targeting the crowd who actually care about what the picture looks like, just get something and get out.
I have not done that thorough of a characterization of the nx5 under those various lighting conditions. So I cannot give you an apples to apples comparison.
Probably we should get some charts for comparing cameras and fully document each of these nx cameras.
I can say that I have only rarely noticed any chromatic aberation on the nx5s. The big big concern is it has an "antiface" detector in the autofocus. In other words, it focuses on sharp objects like trees and buildings, even if the a face is taking up 3/4 of the screen sometimes.
I can only add that I bought an nx 100 and returned it and bought a fourth nx5 because:
The nx100 price was more, the form factor is poor, the picture quality no better than the nx5u etc.
John
John Lenihan
LeniCam Video Productions
http://www.lenicamvideoproductions.com