I'm a little bit biased, but here are the facts.
The NT is the latest and greatest from DYE. It is much smaller and lighter than any DM we've made. Another major difference you'll see is that with the NT, you'll be able to achieve 1700 shots off a 68 / 4500psi tank using the Adjustable Boost Bolt setup.
Here are a few cool NT features:
Dye on/off UL airport
Knob-less cam lock feed neck
Tool-Less Sticky grips
Ironmen blade trigger