See both the institutes are great in there own way. They have good infrastructure. The faculties are technically well oriented and they have good research experience as well. Now whenever you want to choose any of the college, in your case you have to go with the course itself. Now from the job point of view, EE will offer you a much better option compared to that of ME. Its very sad to say but its true that the ME graduates don't get enough scope in terms of jobs and if they get jobs those are either non-core jobs or they have to settle for low salary packages. Now from the placement perspectives NIT Agartala is better compared to that of NIT Srinagar. So if you are ok to go for non-core or non mechanical jobs even after your BTech ME then you can obviously go for it and it will offer you much a better scope.

To know more about NIT Agartala visit the link below:

https://www.careers360.com/university/national-institute-of-technology-agartala

To know more about NIT Srinagar visit the link below:

https://www.careers360.com/university/national-institute-of-technology-srinagar

To know more about the career in ME visit the link below:

https://www.careers360.com/courses/mechanical-engineering-course

To know more about EE visit the link below:

https://www.careers360.com/courses/electrical-engineering-course

I hope this answer helps. All the very best for your future endeavors!