I suggest you change the word ‘technically’ with ‘personally’.
I insist !
I would be considered mahaan idiot in the field of music if I say :
I don’t like Nusrat Fateh Ali khan, technically.
On hardcore musical grounds Both Noor Jahan and Nusrat Fateh Ali khan have no parallel, Period.
If I say that Rahat with a 35 years Riaz on classical music in his rucksack, can sing as good as Nusrat then I am lying. Rahat is a great singer with no match in billion, but nusrat was beyond the boundaries of our musical imagination. I am saying this after listening his 100s of tracks again and again and again.
On the basis of Sur, Raag , Lay, Taal, soze Noor Jahan and Nusrat invented many compositions.
Both signers sung very difficult songs in their era. And composed them too. Nusrat was a intrinsic composer, on the other hand Noor Jahan had a very high stander in composition of song presented to her for singing.