Allow me to paraphrase one ENFP on the differences between Ne and Ni:
Ne seems to operate within time
Ni seems to operate outside time
I often notice that Ne-doms seem to very adept at punditry. By pundit, I mean in the manner it's traditionally understood as "someone who offers to mass-media his or her opinion or commentary on a particular subject area (most typically political analysis, the social sciences or sport) on which they are knowledgeable." As we even see with pundit shows, a vast range of topics are discussed, and it's often very fast-paced. Yes it often can be loud too(but not necessarily).
By contrast, speaking for myself at least - I don't thrive in such an enviroment. I tend to prefer a more calm in-depth discussion on certain themes. I say themes because there maybe a wide range of angles and topics involved, but there's still an underlining theme involved. Here's an excellent example of what I'm talking about from a scholar I have great respect for:
[youtube="_99ZCeO7wfU"]Ni at work?[/youtube]
FYI, I often classify ^^ as INFJ, but he definately is Ni-dom.