Dear student. BBA and B.SC in industrial psychology are quite similar. Both the course involve business and psychology study . whearas B.SC in  psychology is different.

BBA with psychology is a blend of Business management with psychology.This 4 year program prepare effective corporate leaders and Manager. Students who are interested in industrial and organizational psychology also known as occupational psychology can pursue the carrier with BBA  or B.Sc in organizational psychology.This course helps the student in developing curious mind and practical business orientation. Knowledge with psychology with business  and management skills provide scientific understanding of human experience.

Dear Spurti, by any chance are you talking about BA Psychology? If that is the case, BA Psychology deals with communication and social aspects of Psychology. It allows the flexibility in exploring other options in other fields along with Psychology because more importance is given to the electives than to Psychology. However, in B.Sc Psychology the focus is on the science and technical aspectnof Psychology like Clinical and Applied Psychology.