According to the compare between these two, i think Thapar University is a well reputed name in Technical Education in India, It is one of the top 30 colleges in India. You can surely go for it.
You can also visit both college and compare all thing by yourself. Then you would decided to take admission. My all information is on the basis of review and internate fact.
Best of luck.
I think that you have to go for thapar because it is best for cse and their faculties are highly experienced.placement is also good enough.so that you have to go for it.
Hope This Helps.