IET Lucknow is the best Govt. college affiliated with AKTU. It is definitely better than BIET Jhansi from the placement point of view. 

• In IET, Lucknow, the placement record for CS, IT, and ECE are great. While the placement for BIET Jhansi has not been that good over the past few years. According to the recent placement highlights the highest and median CTC offered at IET was 36 LPA and 5 LPA. 
• Also, IET is situated in the state capital. So, you will have access to reputed coaching centers for entrance examinations like GATE, CAT, etc. 
• Both the institute offers average campus and facilities.

Overall, going by all these factors, I will say IET, Lucknow will be better.