I believe as far as Metallurgical Engineering is concerned , IIT BHU being an older technical institute with experienced faculty, good research facilities and industry connections would be a better choice. Even if later on you develop interest in Non Core fields like AI and Software, IIT BHU will provide a sea of opportunities. As far as Metallurgical Engineering is concerned companies like Tata Steel, Tata Motors, Vedanta, Reliance, Jindal are regular recruiters at IIT BHU.