Hello Sapna,
The main difference between BCom and BCom professional is depth of subjects. In Bcom regular, all basic subjects related to commerce are taught at a normal length. In BCom professional, focus of study is made on some extra practice subjects like seminars, project reports, soft skills or communication skills lab etc. besides those in Bcom regular.
Hope it helps.
Good Luck!
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile