You should opt for KNIT as it has overall good ratings. According, to Careers 360 KNIT has AAA+ ratings which means good. It provides good placements, exposure and faculties.
You can also check the detail of both the colleges from the given below link
Also, Bundelkhand Institute of Engineering and Technology, Jhansi has got AAA which means this is just an above average college.
To check about both college's rating and reviews, you can go through the below link -
Kamla Nehru Institute of Technology, Sultanpur
Bundelkhand Institute of Engineering and Technology, Jhansi
Hope this helps!!!