What Is the Difference Between Rasul and Nebi in the Quran?

In Surah Mariam verse 51, wa the code for the katabi mousa in nahukhana mukh la sann wa khan rasul and nebi. And in Surah Al-Arahf, Allah subhanahu wa ta'ala mentions our own prophet verse 157,. He was both a r asul and annebi which indicates there is a difference between the concept of rAsul and the concept of nebi. There is a very, very interesting hadith that is used by many people to indicate that the Prophet sallallahu alayhi was demarcated between annebi and day rasul. So