See BBA in sport management is a management course which teaches you the Managerial as well as Business rules for the industries. BBA in this course will be teaching you more industrial as well as applied stuffs which will help you in taking charge in the industry. But the bachelors of Sports Management is the course which focus on the theories of different aspects in sports management. The Procedures you will learn in BBA Sports Management will be dictated to you as a procedure but if you want to study why that is the way considered by the authority then you have to thought of BSM.

Although in India BBA SM and BSM both are courses but having a very small industry quarter to left with. So it isn't at all feasible if you want to take job. I would say if you invest money in BBA then go for other specialization such as Finance, HR, Hospitality etc.

I hope you got my point. All the very best for your future endeavors!