Hey,
B.Com or Bachelor of Commerce is designed to equip students with the skills in Accounting, Finance,Banking,Business Administration,Marketing and other business subjects.
While,BBA or Bachelor of Business Administration is a college course designed for students who want to develop in-depth knowledge and skills in the fields of Entrepreneurship and Business Management.
Since,both are different so the cutoff for both is different too depending upon the number of candidates applying for the course,the category etcetra. So,let me know the name of the college where you are applying for the admission.
Hope this helps.
Good luck.