Hi, there is not much difference between both. BBA stands for Bachelor of Business Administration and BBM stands for Bachelor of Business Management.

BBA awards students with skills in Administration where as BBM makes the student capable with skills on management aspects.
BBM provides specialization in a variety of areas such as Human Resources, operation, finance, and marketing where as BBA does not meet this criteria.

You can choose the one you are more interested in. Good Luck.