Hi, since you want to compare the both the college so let me tell you comparison in between colleges can be done on behalf of the criterias such as College Ranking, placements, total fees, teacher students ratio, and hostel accommodations etc. So on your need I'm suggesting one link where you can compare not only two but four colleges at a time(link mentioned below):

https://www.careers360.com/compare-colleges

Good Luck.

Dear Aspirant ,

Talking about BBDNIIT ,

Its a good collage in Lucknow affiliated to AKTU.

You can join without any hesitation,but one things you keep in your mind its a Private Collage.

Talking about RKGIT ,

Rkgit is more matter if you are talking for the placement

it depends on you..if u want a prepration for gate then rkgit will a better option

At last both are good colleges try to find which is more comfortable to you

Hope this information helps you ,

Thank you .