The Kolkata Biriyani stands out from the Hyderabadi Biriyani because of its inclusion of potatoes. The addition of potatoes is a unique feature of Kolkata biriyani and sets it apart from other types of biriyani. Another factor that makes Kolkata biriyani distinct is the cooking process. The meat, rice, and potatoes are cooked separately and then layered together in a pot. Overall, both Kolkata and Hyderabadi biriyani are delicious in their own right.