These two institutes are not at all comparable. TIET is way ahead of Chitkara University in terms of placements, infrastructure, faculties etc. Chitkara admits around 1000 students in Computer Science only, Thapar also admits around 600 students in its Computer Engineering but it also provides with qualitative as well as quantitative infrastructure to its students.
And if you compare other branches like Mechanical, you will see that a mechanical engineer from Thapar Institute of Engineering and Technology will have more and better opportunities in his/her core branch. But in Chitkara most of the students are placed in mass recruiting IT companies.