Unfortunately I am using a 68 reg Land Rover Discovery Sport at the moment as my NX Premier was side swiped by an ancient Nissan Note! Fortunately no-one was injured in the accident and the third party and his insurers admitted full liability the next day.
Anyway, the accident asides, in my (and my wife’s) impression is the LR Is quieter (and that is with it having low profile tyres) but imho the interior and comfort is not up to the NX standards. Also with a normal auto gearbox v the CVT, the auto seems a bit snatchy, BUT the LR is a very good vehicle.
I also have a hearing problem and still I would go for the refinement of the NX before the LR.