Hey!

Jadavpur university offers BA economics course , while st.xaviers college , kolkata offers b.sc economics hons course. BA economics is more fheoretical than being practical. Jadavpur university is a government college. And St. Xaviers college kolkata is an autonomous private college with NAAC accreditation of A++. While , jadavpur university has accreditation of A. SO , if there are not any fee issues , then go for st.xaviers college , kolkata. Otherwise  , go for jadavpur university.

To have a comparative look of both the colleges , follow the given link;

https://www.careers360.com/compare-colleges?college=49440-7481-course=61556-141887-compareresult

Hope it helps!