hey,

Both colleges are equally good but you can go through below link to decide further which one is good or in which you have to take admission. it can give you comparison according to infrastructure, placement, reviews so will help you to choose-

https://www.careers360.com/compare-colleges?icn=college-compare-landing&ici=college-listing

To know about NIET  GREATER NOIDA you can visit here-

https://www.careers360.com/colleges/noida-institute-of-engineering-and-technology-greater-noida

To know about BBDNIT you can visit here-

https://www.careers360.com/colleges/babu-banarasi-das-national-institute-of-technology-and-management-lucknow

Good luck!