Hello,

BBA is bachalor degree for buisness and MBA is masters degree for buisness. If you have already a graduation degree with any subject then you can go for MBA becouse you can't do BBA then.  But you didn't mentioned it above you are a school passed student or you are a college passed student. If you are a diploma student then you can do BBA. And BBA and MBA both are good difference only the degree which is bachalor and masters.

All the best.