Both the courses hold there own position in the market. It depends upon your interest. Both have good future prospect.

If you are interested in technology you can go for B.tech+ MBA and if you are interested in business you can go for BBA+MBA. 

Hi, Choosing your career stream would largely depend on your own interests and career aspirations. However, both combinations would give you good career opportunities; you can opt for BBA + MBA if you purely want to get into Business administration, else if you are looking for a combination of technology and Business you can opt for B.Tech + MBA, there are hundreds of B.tech students who plan for MBA, After doing B.Tech you can get into Management operations. Hope this will be of help. Good Luck.