IIT Kanpur - Indian Institute of Technology

Well both the courses are good. But cyber defence from IIT Kanpur is best from the above mentioned.

Home state is only for NITs CFTIs GFTIs not for IITs.

Yes, you will surely get admission into IITK.

IIT Kanpur is better than IIT BHU according to ranking but all iits are best in their own, depends upon the branch you got in IIT BHU I. e. you have two option let assume textile in Kanpur and ECE in IIT bhu then afcourse IIT bhu ECE is better option.

Dear aspirant, Glad to meet you. Students who have done B.Sc. (IT/ CS are eligible to take admission in B.Tech Computer Science through lateral entry mode. According to the AICTE Guidance, candidates who have completed B.Sc. With a minimum mark of 45 percent and have completed class 12 with the subject of mathematics are eligible. So Yes, It is possible to join B.Tech course after completing B.Sc. Through the lateral entry scheme which is offered by most of the Engineering colleges. Hope it helps.

https://www.shiksha.com/engineering/articles/iit-fee-structure-for-btech-blogId-6275
You will find all the true and authentic information about your college here.you have a very well chance of getting into the above colleges mentioned by you just look at the citoff.

You can refer to the link given below-
https://www.shiksha.com/college/iit-Kanpur-indian-institute-of-technology-25116