Hello Aman,

Without a thought, Dual-Degree is a better option as compared to just B.Tech. B.Tech + M.Tech takes 6 years where Dual-Degree program gives you both degrees in 5 years span. IIT Buvneshwar ranks at number 9 whereas IIT Dhanbad ranks at number 19. So, by these 2 points pursuing Dual-Degree from IIT Bhuvneshwar is a better option as compared that just B.Tech from IIT Dhanbad.

All The Best