Narsee Monjee College of Commerce and Economics and Narsee Monjee Institute of Management Studies is two completely different institutions. The common thing between them is that they are registered under the same trust names SVKM.
NMIMS has better academics because their courses and syllabus are regularly updated according to the response given by the students. They can update their syllabus however they seem fit but on the other hand, NMCCE is under Mumbai University which does not change its syllabus frequently and has outdated courses too. Moreover, the fee for NMIMS is way higher than NMCCE which is considered affordable.