question #1 Sahih Muslim 517b, Book 4, Hadith 315 : What is the significance of using different words in hadith narrations and how does it affect the understanding of the message?

This hadith has been narrated by Hisham b. ‘Urwa with the same chain of transmitters except (with this difference) that the word mutawashshihan was used and not the word mushtamilan.