Dear aspirant,

IISER-TVM and Pune both offer five-year BS-MS Dual degrees. There are a few differences though.

In IISER-TVM you'll have to do all courses (Physics, chemistry, math and biology) for four semesters and you'll have to pick a major in the third year (fifth semester). These are basic introductory courses and in IISER Pune this happens only for the first three semesters after which you'll get to pick two disciplines as pre major choice for one semester and then move on to one discipline for major coursework. You have the liberty of not choosing a major in IISER-Pune. You can take courses to fulfill the credits and you'll graduate with a BS-MS in Science instead of a BS MS in biology/ physics/math/chemistry. This option is not available in TVM. Other than that everything else like is almost similar between both the institutions.

Hope this helps.