There are several parameters for drawing a comparison between these two colleges. Some of them are mentioned below-
During 2022 placements at NIT Silchar, the highest package went to INR 44 LPA and the average package stood at INR 13.58 LPA. The list of top recruiters included Amazon,Microsoft, Adobe, Arcesium and Intuit. For the CSE branch, out of 97 registered students, 82 were placed, and 126 offers were given to this branch in total.
According to me, the choice is very subjective. You should make your decision after thoroughly considering the pros and cons of each college and department.