Among the above institutes, PEC Chandigarh is the best choice, considering the factors of availability in streams, fee structure, etc. If you have a specific branch in mind to pursue, then you can definitely choose PEC Chandigarh. But if you are considering a non-IIIT or non-NIT tag then you can opt for DTU. 

The table below gives a brief level of comparison among the institutes.

Key Highlights:

• PEC Chandigarh is a government institute and so has a much lesser fee as compared to Thapar University, which is an autonomous university having a much higher fee structure.
• There are some subjects in PEC Chandigarh which are not available in other institutes like Thapar University or CEG, for example, Aeronautical Engineering.

Therefore, PEC Chandigarh is a better choice considering the factors stated above. Other than these, all the three institutes are incomparable to each other as they offer similar quality placement.