Is NIT Tadepalligudam better than Amrita?

It is quite unreachable and good faculty is not available too for teaching on time. My sister studies at one of the old NITs which are much better as far as networking and alumni support are concerned; they are better than the NIT you're enquiring about. Its ranking is not clearly available on major ranking platforms also. 

Apart from this, you may want to note these down-

• Do not select any of the following NIT campuses: Andhra Pradesh, Mizoram, Puducherry, Goa, Arunachal Pradesh, and Sikkim.
• NIT Andhra Pradesh was established in September 2015 and hence, there's a dearth of good companies and excellent jobs.
• If you're moving there from another state, then I'd advise you to spare the effort because the crowd is not very bright.
• The central government has not made any provision for the allocation of funds for NIT Andhra Pradesh, but you'd find that huge sums have been invested in IIT Hyderabad and NIT Warangal.

However, NIT is still in its developing phase, it has the potential to become as successful as its other namesakes but being new, permanent faculty is still to be recruited, some equipment is missing too, but being dedicated you might excel even there.

Now, I hope you'd understand that there are much better institutes in Andhra Pradesh and Telangana like JNTUH, JNTUK, IIT Hyderabad, IIIT Hyderabad etc. Well-known companies would actually like to recruit from these institutions rather than from NIT AP.