Difference Between Zadis and Twelvers

The main difference between Zadis and Twelvers lies in their beliefs about the number and identity of the designated successors of Prophet Muhammad. Twelvers believe in 12 successors, with the 12th Imam being the Mahdi who is still alive and will rule the world. On the other hand, Zadis only agree on three successors after Ali, Hassan, and Hussain, diverging from the line of succession believed by the Twelvers.