hey,

BMS stands for bachelor of business administration and BBA stands for bachelor of management studies , some of the institute or university may call BBA and some may give name as BMS , however as far as brand name is concerned BBA is better than BMS , BMS more focus on analytical and logical oriented concept and BBA focus on core studies however both are management course , they can be more differentiated on the basis of syllabus and difficulty level.

hope this helps!