BDS is a professional Dental course, the best after MBBS. And on the other hand, B.Sc Nursing is a nursing course. You study BDS to become a Dentist and you study B.Sc Nursing to become a Registered Nurse. BDS takes the cake after MBBS. You cannot compare both the jobs. But surprisingly both the courses have their own scope and future and in fact Nursing has many international opportunities. In the terms of commanding respect, BDS stands on the top.