All three colleges are good engineering colleges and each of them has their unique pros and cons. For instance,

In terms of placements and academics, the preference order would be 

• NIT Silchar>NIT Agartala>Tezpur University

In terms of campus life, the preference order would be 

• Tezpur University>NIT Agartala>NIT Silchar

As a whole, NITs are well known for their excellent placements, brand name, faculty, and elaborate alumni network whereas Tezpur University is known for its widespread beautiful campus, research culture, and extracurricular activities. 

So, you can choose the college that meets your expectations of college life.

It is recommended that you go for any of the NIT Agartala or NIT Silchar over Tezpur University (TU). Here’s mentioning some points as to why it will be a better option.

• The major thing the NITs possess is the brand name. This name could turn out to be really beneficial for your career ahead.
• Overall placements at NITs are much better. Whereas TU is known only for its CSE department.
• Top companies like Goldman Sachs, Wells Fargo, KPMG, ICICI Prudential, American Express, Barclays, etc. take part in NITs placement programs.
• These companies offer salary packages ranging from 12-14 LPA. The average CTC rises upto 8.5 LPA.
• The administration of NITs are well organized unlike TU.
• Tezpur University being a newer establishment has very less industrial exposure, this is certainly better in the NITs.
• NITs faculty is highly qualified and well experienced.

If you are interested in studying CSE then only consider TU, otherwise NITs are the best at everything. Being a more experienced institute NITs can provide you the proper guidance and connections required to move forward in your career.