Hi aspirant,

Both Jossa and all CSAB are the counselling conducting authorities based on the candidates performance in the JEE main and advanced examination. However there are some significant difference between two. Jossa conducts counselling to offer seats in NIT, IIT, IIIT and GIFT colleges. In Jossa counselling various reservation and categories are taken into consideration.

CSAB counselling is conducted only once the Jossa counselling is over and only vacant seats are available for grabs. In this counselling only CRL rank is taken into consideration for seat allotment.

Also it is very important to know that most of the seats are filled during the Jossa counselling only and number of seats available in the later one is very less.

To know more about it in detail visit the links given below

https://engineering.careers360.com/articles/josaa

https://engineering.careers360.com/articles/csab

Hope it helps!