Both the courses are good. 

However, with the advancement of technologies like AI and ML, and one’s increasing dependency upon them, Data Science has become a field with immense potential. 

Data Science has a lot of future scope, and its demand will only increase with time. This field requires a good understanding of Statistics, Mathematics, and Computer Science (Especially Python Language). 

BSc. in Data Science is an even better option than CSE at present. Moreover, college-wise, IIT Kanpur is way ahead of IIT Dhanbad. 

Therefore I would recommend you choose BSc. Statistics and Data Science at IIT Kanpur over CSE at IIT Dhanbad.