IET Lucknow is better. Being a Govt. institute it charges a lower course fee. If you are planning on preparing for competitive examinations like CAT, GATE, GRE, etc. IET will be the right choice. The college schedule is flexible and leaves a lot of room for exploring other interests. Lucknow has good coaching institutes for competitive examinations. At IET, you will meet seniors who have qualified GATE, CAT, GRE, etc. They will be able to guide you regarding preparations.
If you compare NIT Raipur and VIT Chennai, then NIT Raipur is much better than VIT. In the given table you will get the basic information of NIT Raipur and VIT Chennai.
Here are few reasons why NIT Raipur is a better option.
Therefore, if you are choosing between NIT Raipur and VIT Chennai, then choose the former. The placement of NIT Raipur is also good. Branches like Electronics and Telecommunications, CSE, Electrical, Mechanical have good placement records. However, Metallurgy, CE, Mining branch placement is not very promising. So make your decision based on these things.