I think I know where you got this idea from. š
They just cannot replace each other!!! They are unique and if they interchange their roles, it would turn into a comedy circus.
Think of one such scene. See where the dialogue changes course.
Daya : Abhijeet, jab us aadmi ka accident hua toh tum wahan kya kar rahe the
Abhijeet: Main??? Kisi ke saath dinner pe gaya tha.
Daya : Kya wohi hai, jiske liye jewellery banva rahe ho?
Abhijeet: haan wohi hai. Uska naam Sonali hai....
Lekin tum yeh sab kyon pooch rahe ho, hain???
Daya: Bas aise hi. (and the boyish grin - with a difference)
Edited by visrom - 15 years ago