I have a friend who completed a dual degree in Economics from BITS Goa and he vouches for the course. Economics in BITS Goa is actually a brilliant department. Also, if you wish to do an MBA in the future an economics degree can prove to be very useful. Apart from this the Economics department also has some brilliant professors and they offer some very good electives like Security Analysis and Portfolio Management and Financial Management.
Now, here are a few cons regarding both colleges.
BITS Goa:
NIT Surathkal:
It often is the case that students of 12th standard are clueless about their field of interest after finishing their studies. Being in a dual program, you get an extra year to decide on your field(subject) of interest