It would be recommended that you talk to the faculty, alumni, etc. of each of the schools and make an informed choice instead of thinking that either is 'bad'. Don't be naive and ask generic things like 'does a MICAn MBA have any disadvantages'. Remember, there are truly no absolutes and every institute can have its pros and cons depending on what you want out of it.

Assuming that you want to do Brand Management specifically, MICA is a great choice and potentially better than NMIMS given that it's a full-fledged specialization, something that MICA is known and reputed for, and you'll get good placements in that field. Additionally, MICA is known for its industry partnerships, collaborations, and real-world experiential learning opportunities, all of which can help you gain practical skills and industry exposure.

However, keep in mind that MICA is a niche school that focuses primarily on communications and marketing, so if you're looking for a more general MBA program that covers all aspects of business, NMIMS might be a better choice for you. NMIMS has a strong brand and reputation in the industry and offers a well-rounded MBA program that covers all the major functional areas of business.

Ultimately, it's up to you to decide which school is the best fit for your personal and professional goals. Do your research, talk to people in the industry, and consider your own strengths and weaknesses before making a decision. Remember, the school you choose is just one piece of the puzzle - your own hard work, dedication, and determination are what will ultimately lead you to success in your career.