Well clearly when the wheel and the tube are made in tandem with clearly defined tolerances it makes a huge difference, which makes for a much easier experience.
That being said it is not terribly difficult to fit my Schwalbe One Pro's on my Acebike Chinese wheels and at 1/3 the price I am not sure it's worth it. Yes I do need the Airshot tubeless tyre inflator to give it the push to mount first time and obviously I would not compare the quality of Chinese wheels to that of named brands.
I am interested in the rolling resistance vs grip, not that I have a problem with grip on my One Pro's but I do find myself looking at RR tests when a new set of tyres come on the market