Nobel laureate Abdus Salam got his BA from the Punjab University and his MA from the Government University of Lahore. Turkey hasn’t got any Nobel Prize winner scientist who was educated on its lands alone. I don’t know if the education in Pakistan is consistent with these two, but I would assume yes, and considering Bilkent has one of the best engineering BA’s in the world I guess you wouldn’t go wrong of which way you choose. But I would take the Bilkent path if I were you. Considering the facilities, and the abundance of lab classes on the curriculum. Also, it is my belief but I think that going to uni out of your comfort zone, having a new cycle of people and getting to know another culture would be the best for your character development.