They are certainly different machines, and that gives you a clue as to my main issue with the NC750X: it doesn’t look terribly cool. I have, as I say, seen the NC700X in the flesh and although I am totally in love with its features and practicality, I’m not at all that jazzed about its plasticy plasticness.
Overall, I like the NC750X a lot. A whole lot. Enough to pay money for it. But I’m not sure I could ever really love it.