LOL soup
Rich, I think it is essentially down to preference and convenience; not many people change system / brand once they've started properly.
Both big brands (N+C) can do whatever the other one can do, if differing slightly, and the one that is behind at any one time will always be working to produce a better item, that will eventually render them in front, and so it goes on.
Debates or even posts though, as OP rightly said, are often fruitless, because there isn't a right answer, and there are always brand loyalists...