Both Colleges, wont really effect your preparation for UPSC CSE, provided youre a serious aspirant. However, IET Lucknow has better faculty, infrastructure, strong curriculum besides above average placements being perhaps one of the best Engineering Colleges in UP Capital, Lucknow. KNIT Sultanpur is perhaps a good college, but nowhere near IET Lucknow in terms of Placements or Faculty.

However, IET Lucknow or KNIT Sultanpur, either College will have enough opportunities to help you build a strong profile, to represent during UPSC Interview provided you qualify.

For more information, College Comparison, Fees and Cutoffs do follow the link below

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