Bro, I'll try to answer you query from my experience NOT from scientific/technical basis.
In general, CRDI engines are quieter and have less vibration. Idling noise is more noticeable than high speed noise once the turbo kicks in. They drive like cars with a little bit of noise and a bit less responsive. In a scale of 1-10 (noise and responsiveness), I would say that it's 8 to the 10 of cars (1.6 non-european sedans). You will hardly feel/notice the engine sound as you gather speed. NO VIBRATION. Swabe sila parehas. You'll surely enjoy your music
Comparing the idling sound of the Fortuner to that of the Sorento, the Fortuner has a deeper tone, a bit noisier than the Sorento, 9:10 I reckon. This is for a 6-year old Fortuner vs an almost BN Sorento. As a side note, I observed that when my 1st gen Tucson reached around 40K mileage, its idling and low speed noise, like the stop and go when you're in traffic, there was an irritating humming noise. Parang umuungol. Althought it disappears as it gathers speed, it's very irritating. I didn't observe this humming noise in the Fortuner even after >130K km mileage. I'm not sure if KIA CRDI have this noise as well kasi pareho sila ng Tucson ang tunog nung bago pa. It remains to be seen.
I hope I answered your query, bro. Again, these are all personal observations.
PS. I didn't get what NVH means...
Cheers!