I think this is v much a matter of personal opinion.Anyone ever notice that Porsche and Mercedes seem to be built like a tank compared to BMW and paint job also seem better? When I shut the door on aPorsche and our Mercedes compared to my BMW they have a nice, solid thunk. Both seem built like tank. My wife states that all the time.
My wife reckons her X5 is significantly quieter than my Macan and several thimes when she's got into my car she's shut the door and said "Why can't Porsche make nice solid doors like my X5". Horses for courses...
I love my Macan, but afraid I have to agree the X5 is quieter on the highway. I think this is mainly due to tire noise, have the continental's on my Macan & will change to the Michelin's next. Our X5 has 315 section on the rear, so I'm surprised how quiet it is.