To me, New World Order and world government are synonymous. However, a new world order and world government may not be, necessarily. I know, subtle distinction. I think Kissinger wants a New World Order, i.e. world government--and of course he and his pals would be in control.
Anyway, I think people make too much of a big deal about the phrase new world order or the concept as world government (both from believers in the CT or the detractors of it). The issue isn't even about people setting up world government in secret, though I think there are.