Hey Himanshi,

Both are good at there aspects essentially, it is determined by the size of your wallet. Thapar will provide you more exposure and a better placement package, whereas GNDU will give you a better placement package but with a lower exposure. Both are excellent. Finally, if you have a decent JEE score and can afford Thapar University's expenses (Around a lakh for one semester), go there blindly; otherwise, GNDU is a viable alternative.

Hope it helps.

Thank You.