Between NIT Jalandhar Mechanical Engineering and DTU MAM, the latter is the better option. This is because the placements for DTU mechanical are excellent. Some of the most reputed firms that visit the campus are Bajaj, Volvo, Daimler-Benz, Brahmos Aerospace, Technip, Schlumberger, Caterpillar, etc. Most of my friends from the same branch were able to secure amazing packages at top firms.
The learning process at DTU is more extensive. It has a lot of Mechanical Engineering teams which can help you know your branch better.
So choose DTU over NIT.