You need to compare the two universities to make a decision between the two. Having friends studying in both the institutes, I might be able to help you with the question.

Metallurgy at NIT Rourkela:

• Campus-wise, the college has a very large campus.
• But, if you are planning to pursue metallurgy, let me tell you that you will have lesser job opportunities in both the public and private sectors in India.
• You might have to shift to another country to get a well-paying job and earn decently in your field of study.

Electrical at NIT Silchar:

• There are also some really good facilities here including the largest digital library in South Asia.
• The campus is really good too.
• The placement records are amazing. Moreover, electrical is an evergreen branch with decent scope in the public sector. This would surely make a good alternative.

Finally, it all boils down to your interests and which field you prefer more. Both fields come with their own pros and cons.