BBA and Bcom both are commerce management fields. In this cource you will be taught about the skills which are essential for the corporate world.
Some of the subjects which are common in BBA as well as Bcom are accounting, marketing, behavioural skills, human resource, management and planning , analytical skills, soft skill etc.
Where as in Bcom you will be more indulging in higher levels of accounting and management the terms will be more related to finance.
In BBA you will be completely focusing upon the management skills which are required to sustain in an organisation.
Hence both BBA as well as Bcom will be helpful for you if you want to do MBA in future.