Hello Piyush, 

Between HBTU KANPUR and new IIIT, i would recommend you to join HBTU KANPUR. The resons are the college is having a good alumni base, its recognized college all over the country, Well recognized companies visit for the placement. But new IIIT is still good colleges but still a long way to have a record so still some of the IIIT's first batch is waiting for the placements. IIIT's are the central government college and its placement is good (for some IIIT's) than HBTU Kanpur IT branch. HBTU is state government college and very old college. Its infrastructure and facility is not so good like central government but faculties are the best. But still, IIIT is having a brand name which sometimes matters a lot.

Hope that helps

all the best