Hey Ria

The option of having  B.Sc. will involve a strongerfocus and concentration on the major thing and area you want to study rather than distributing concentration over liberqal arts and subjects lik eforeign laguage(which is a part of BA courses in most colleges) and BSc. students will take more number of psychology courses  compared to  those who are pursuing a B.A. Moreover there is more flexibility in BSc as you can switch to MA later but you can switch to MSc after BA. So according to me BSc in Psychology is better.