Based on the WBJEE rankings, IEM ranks higher than Heritage(HIT), and comes just after JU and Shibpur BE college. But, when it comes to placements both have almost the same set of mass IT recruiters offering almost the same package, without any differentiation between the topper and the bottom of the class guy. If you want a better happening college life, i would say go for Heritage, as it has a sprawling campus with good infrastructure, which IEM lacks, being situated in the heart of the corporate center in the city.