The raag performed by Bibi Amrjit Kaur is somewhat different in composition from those by Bhai Nirmal Singh and Prabhu Nam Kaur and Snatam Kaur (mother and daughter). But listen to Bhai Nirmal and compare it to Prabhu Nam and daughter -- the same, but not the same.
The audio file of Bibi Amarjit Kaur is a live performance at a wedding conducted in Espanola, New Mexico at Ashram Guru Ram Das.
Now the links play no longer. I had to take them down from my website because I needed to liberate server space for a project. Send a pm and I will send them to you. Edited by me.