The 1 Nikons provide the real data on their lenses.
As does the DL series.
http://www.nikonusa.com/en/nikon-products/product/premium-compact-cameras/dl18-50-f%252f1.8-2.8.html#tab-ProductDetail-ProductTabs-TechSpecsThe difference is in the press release, where the 1 Nikkor lenses were called by their actual data then.
http://nikon.com/news/2013/0108_lens_02.htmA few interesting attributes (DL18-50):
4k video recording maintains photo focal range (unlike D5)
Slow motion in 1280x720 by 240p (8x slower).
Elimination of rolling shutter issues in video recording
manual shutter available (until 1/2000s)
SDXC cards again (I don't like the micro-SD cards of the J5)
same battery like the J5 (EN-EL24)
The 6.7mm wide end is much faster than the 1 Nikkor 6.7-13mm (f1.8 vs f3.5), approx. 2 f-stops faster
The 10mm setting might be faster than the 1 Nikkor 10mm/2.8 (tbc)
The 18.5mm setting is a bit more than one stop slower than the 1 Nikkor 18.5mm/1.8
ergonomics seem to be better than the J5 (tbc with actual usage)
normal sized flash hot shoe (finally)
nano coat (iirc, only 1 Nikkor 32mm/1.2 and 70-300mm have nano coating)
flourine coat (n/a on 1 Nikkor)
MFD: 3cm at wide end
Will be interesting to see, how it performs.
rgds,
Andy