There is nothing such as a better college. It all depends on where you want to see yourself 10 years from now. But considering the current scenario, DTU is ahead of NIT Jalandhar.
Being located in the capital, the environment and culture at DTU are better. You will also get to avail better facilities here.
You can prepare for TOFEL, CAT, UPSC for which the college institutes in Delhi are best.
Apart from this, the placement scenarios are equally good at both colleges. The only thing better at NIT Jalandhar is its tag.