See ok I can understand this question might have come out of curiosity but believe me there is no comparison between these two colleges.
Thapar is well established and one of the most prestigious colleges of our country which also gives you the opportunity to go and study abroad in top100 world ranking colleges such as Trinity Dublin and other so many and just for your information IIT Bombay is not even in top 200 world rank .
So many people leaves IIIts, NITs, and even lower branches of BITs and join Thapar and now let’s come to Chitkara People outside Punjab even don’t know this college’s name and you may think that NIRF ranking of this college is good then remember even NIRF ranking of VIT is 15 and that of Thapar and BITS is 29 and 30 respectively.