Reciting Surah Rahman For Healing
For first part of your question, please refer to the video below from 33:46 to 37:05 Regarding second part, I personally haven’t noticed this but most of the times, such differences mainly have to do with differences in Arabic dialect and their pronunciation and have noting to do with changing of the meaning or content of Quran. https://youtu.be/BhIGZR6jENk?t=2026