NIFT

You need to give preference to your stream over center. However you need to see if its a safe environment,how the facilities are,ask seniors ,etc. You can always ask the faculty at your counselling center and they will guide you properly. You can also look at NRI seats.

The most important thing they consider in your CGPA. You need a minimum of 7.5 CGPA just to qualify for these programs. As the seats are limited the students with the highest CGPA are selected. For FIT cgpa and a portfolio are the qualifying factors. Once you get selected from NIFT you apply to FIT and go through their admission process.

Although the list keeps changing every year but you can use this as a reference-
http://www.nift.ac.in/Downloads/FIT_21sep16.pdf
http://www.nift.ac.in/Downloads/studentexchange_2016_17.pdf
http://www.nift.ac.in/Downloads/studentexchange_20aug.pdf
http://www.nift.ac.in/Downloads/Revised15_2_16_StudentExchangeOpportunity_ July_December_2016.pdf
There will probably be a different set of colleges for this academic year.

It is best to go to their site and read up about whatever course you want to take.
http://www.nift.ac.in/Downloads/Admission-Prospectus2017.pdf

Getting admission in NIFT has nothing to do with you being an average student. You will have to prepare for an entrance test to get into NIFT.

National Institute of Fashion Technology (NIFT) is a fashion institute in India. It was set up in 1986 under the aegis of the Ministry of Textiles, Government of India and is an institution of design, management, and technology for the international fashion business. The majority of today's famous fashion designers are NIFT pass out.
NIFT is a better option in comparison to your other choice.

NIFT is undoubtedly the better option when it comes to designing courses.

Your question is not clear. NIFTs are Indian institutes for graduation and post graduation studies in Fashion Designing, Technology and Management.

NIFT, Kolkata comes under top 5 NIFT centres. The faculty is one of the oldest and most experienced. And one can sit for the placement from any of the centres. So placement is not really an issue.