Dear Pallavi

U need to understand the difference between these two terms i.e B tech and MSc. If you are getting CSE in Thaphar via JEE Mains then it is well and good , go with that and if you are interested to go in research line or to be a professor then MSc Maths dual degree will give the elite platform for your future development at BITS Goa premises. So overall both the college Thaphar and BITS are good it depends upon you which field you will select.

All the best