Several posters have commented that the NC700x and NT700V share the same platform or engine. As Buffalo pointed out, they aren't on the same platform. Given the displacement, I was under the same impression that they shared the same engine, but they don't. The engines are of completely different origins.
The NT700V engine is a v-twin derivative of the NT650 Hawk. The NC700 is a parallel twin, basically a Honda Fit inline four, split in half. I suspect (but don't know for certain) that the NT and NC designations are references to the engine family.
NC700:
Engine Type 670cc liquid-cooled parallel-twin Bore And Stroke 73mm x 80mm
Induction PGM-FI, 36mm throttle body
Ignition Digital transistorized with electronic advance
Compression Ratio 10.7:1
Valve Train SOHC; four valves per cylinder
NT700:
Engine Type 680cc liquid-cooled 52 degree V-twin Bore And Stroke 81mm x 66mm
Induction PGM-FI with automatic enrichment circuit, 40mm throttle bodies and 12-hole injectors
Ignition Digital transistorized with electronic advance
Compression Ratio 10.0:1
Valve Train SOHC; four valves per cylinder
Apparently, in addition to the crash bars, led foglights and other "adventure" accessories, they showed dealers a setup with the high front fender and dual sport tires which, coupled with 6" of travel front and back, lends some more creditbility to the "adventure" tag. As long as it doesn't carry the DCT transmission, it seems about as "adventure" as the V-Strom series