Dear Applicant,

I hope you are doing well, about your question, doing BSC Honours is much preferable. Honours program is all about a specialization in 1 particular subject like maths. In your final year they make sure you grasp alot of the important information pertaining to maths like algebra, calculus n much more. That doesn't happen for regular course. You learn maths but other subjects too like pcmb or other stuff like cs biology.  After BSC u can go for MSC too but in regular mode only. But with Honours u can go for specialisation ie MSC in pure maths.

Bsc in regular is just like doing your 12th class science again for another 3 years with more brushes off knowledge. While your BSC in Honours is like only doing 1 particular subject and its other branches that you like. So if you are ready to take up your career totally in maths go for BSC Honours. The pluss point is first 2 years it's a general course u have to study other papers too so you can take time and think if u want specialization in any 1 subject.

Hope this helps you.

All the best