General BBA and BBA with specialization is more or less same. There is nothing big difference between them. The first year of these courses, same topics are taught. Second year onwards, the change in topics is started. Means, in BBA with specialization, the topics related to the specialized course are taught. If you have taken specialization in Marketing, then your course chapters will be related to them. In Specialized BBA, depth knowledge of subject is given while general BBA gives an overview of all subjects.
Both the courses are good and have their own scope. Now if you are aiming for pursuing MBA in the same specialization, then you can do BBA with specialization in the same topic. This will give you more clear view of that specialization.