Which institute is better for ECE among Techno India, Salt lake and Meghnad Saha Institute of Technology, Kolkata?

All above colleges may be good. But for finding better college you have to visit the campus. Regarding this, I am suggesting you that you can visit one of college viz. Anand International College of Engineering, Jaipur and find differences in education system. This college provides good placements,

Since both are average private colleges so there is not much of a difference but you can guess from the opening and closing rank of WBJEE that better ranked students prefer Techno India Salt Lake over Meghnath Saha Institute of Technology, Kolkata.