Engineering in Kolkata

Hello Saurav,
Please refer to this link to get more insights of the colleges and branches.
https://www.shiksha.com/resources/college-comparison
However, IEM is better than Heritage Institute of Technology in terms of placement.

I will suggest you to join Institute of engineeing and management Kolkata because it is the best private college under WBUT and It's reputation is also good.

https://www.shiksha.com/resources/college-comparison
Please click on the above link to get all details about both the colleges. It is Shiksha's online college comparison tool that helps you choose the best college for you.

I don't have much knowledge on their placements but UEM, Kolkata the best engineering college to provide good placement cell and infrastructure to pursue career in mechanical engineering. To get more aware of the college and its courses visit here:
https://www.shiksha.com/university/university-of-engineering-and-management-kolkata-47398

Techno India
Heritage
Brainware
Narula Institute of Technology
Birla Institute of Technology (Kolkata)
UEM
IEM
CIEM
Dinabandhu Andrews ( B.Sc & M.Sc CS)

I don't have much idea about the college you have named but I'd suggest you to go for UEM, Kolkata as it is the best college for B.Tech in mechanical engineering with good consistent record. For your information about the college and its courses with fee structure see the link:
https://www.shiksha.com/university/university-of-engineering-and-management-kolkata-47398