All the colleges you have mentioned are top notch engineering colleges of India. Heritage Institute of Technology is among the top private engineering colleges and has been ranked at 154th position by NIRF among the engineering colleges of India. This colleges has been rated with AAA+ Grade by Careers360 2which means Good. https://www.careers360.com/colleges/heritage-institute-of-technology-kolkata

Kalyani Government Engineering College, Nadia is a government Engineering college affiliated to Maulana Abul Kalam Azad University of Technology. However like Heritage Institute of Technology, IEM, KGEC hasn't yet received any remarkable ranking from NIRF. https://www.careers360.com/colleges/kalyani-government-engineering-college-nadia

Coming to the next, Government College of Engineering and Ceramic Technology, Kolkata is a government Engineering college. It is also affiliated to the state technical board, MAKAUT. Like KGEC, this college hasn't yet received any remarkable all India ranking. However, Careers360 has rated this college with AAA+ Grade which means Good. Both KGEC and GCECT are not in top 200 engineering colleges of India. https://www.careers360.com/colleges/government-college-of-engineering-and-ceramic-technology-kolkata

Institute of Engineering and Management, Kolkata is considered as the top most private Engineering college of West Bengal. NIRF has ranked this Institute at 191st position among the Engineering colleges of India. Careers360 has rated IEM with AAAA grade which means very good. https://www.careers360.com/colleges/institute-of-engineering-and-management-kolkata