Hi Aspirant,

All india counselling process in engineering colleges are conducted by JOSSA and the colleges participating in it all NIT,IIIT or gfits or may include some renowned state universities .However their counselling process is one way to go and it is on all india basis.If you dont get chance in 2nd round then go for 3rd round.However state counselling is conducted by the state and is completely a different process and you can get chance in colleges in your state only via that and generally have no connection on All india counselling.However you can still get chance through your all india rank in the state counselling.Most state has that facility.

All the best and hope it helps!!