Colleges in Gujarat

No, IIM-A is not overrated.
It takes a lot to get to the top, and it takes a lot more to stay there for eight consecutive years. Indian Institute of Management, Ahmedabad (IIM-A), did just that, monopolising the No.1 spot in the BT Best B-schools survey from 2003 to 2010.
However, in 2011, its golden jubilee year, the country's oldest business school slipped to the third spot, coming in behind its namesakes from Bangalore and Kolkata.
The fall from its perch was stunning, but it appears to have been an aberration. IIM-A has roared back to the top in the 2012 survey.
The institute scored well on brand value and in equipping students with the skills to become ethical business leaders. It also did well on the quality of global exposure: student exchange programmes, lectures by global business leaders and participation in global forums. Where it fell short was in the living experience, return on investment and, in what should be a big cause for worry, the learning experience.

The choice totally depends upon your specialization of MBA course, whether you want marketing domain, supply chain management domain, finance domain, operations domain, etc.
IRMA is better in terms of course it offers.
IRMA offers Post Graduate Diploma in Rural Management and is among the best institutes in this field in India.
So, if you have an inclination towards rural management then go for IRMA.
On the other hand, Jaipuria Institute of Management is a decent college with decent placements and offers a variety of courses. They offer specializations like PGDM in financial services, PGDM in retail management, PGDM in service management and PGDM in marketing.
Rest are the secondary factors like location, infrastructure,faculty, campus life, etc.
So, depending upon the above parameters, you can decide which college you want to choose.

Quantitative Ability
Quantative availability: The exam more closely resembles a bank PO exam then MBA exam. For quantitative ability, the best preparation to take Bank PO papers. Check for Pratiyogita Darpan under Google books, there are many previous issues. Take a copy of only quantitative section and solve it by setting time because unlike other exams the time is very limited.
English Comprehension
This is a relatively simple section as it consists of different types of questions like reading, comprehension, para, jumbling, sentence correction, and fill in the blanks. You should be solving previous year papers and mock test papers to improve your skills in English.
issues of social concern.
This is the toughest section in the paper. The questions are mainly around agriculture, environment, education, as our organization heads current affairs, NGOs. Also, development programmes are the best way to prepare for this section. Read a newspaper daily especially Hindu editorials. You should also practice online test mock test papers of GK.
Hope it helps.

The cohort at IIMs and NUS is very different in terms of diversity and experience. IIMs have almost half of their cohorts fresh out of college whereas NUS has most of the participants who have reasonable work experience. Singapore being a finance hub attracts an extraordinary exposure in term of learning which IIMs and most top B-Schools in India cannot. Also, the median CTC that is offered at NUS is way higher than that at IIMs. If we see the course fee, the MBA from NUS costs around 40-50L INR whereas the fee for the full-time MBA from IIM A, B and C costs between Rs 17 to Rs 22 lakhs. The student pedigree at IIMs A/B/C and NUS is equally impressive. CAT percentile of 99 and above and GMAT scores of 720 and above ensure only the top minds enter.
The global MBA experience, in my opinion, is what makes NUS slightly better but if someone wants to pursue MBA without much experience, IIMs are an excellent option.

Honestly speaking both colleges are good. They both are government top management college and the tag of any college in your CV is good. You can prefer any college after reading this, but keep in mind studying away from home is very hard.So try to take the nearest college.
Placements at IIM, Bangalore, and IIM, Ahmedabad:-
At IIM-B PGP 2015-17 placements there were 410 students. About 413 offered were made while 410 offers were accepted. Approximately 150 companies participated. Top recruiters for summer placements were The Boston Consulting Group, Accenture Strategy, Amazon, Goldman Sachs, Aditya Birla Group, McKinsey, and company, AT Kearney, Bain and Company, Snapdeal, Cognizant Business Consulting, MH Alshaya, Flipkart, Airtel, Citibank, Hindustan Unilever among others. The companies which recruited from IIM, Ahmedabad include Accenture Strategy which was the top recruiter which was closely followed by Bain & Co 16. The other prominent recruiters were the Boston Consulting Group, Deloitte, McKinsey & Company, Oliver Wyman, Roland Berger, Barclays, Avendus Capital, Citi Bank, Credit Suisse, Deutsche Bank, Goldman Sachs, HSBC, Microsoft, Cognizant, Google, Samsung, Wipro among others.
Courses offered at IIM A and IIM B:-
The two-year PGP programme in IIM, Bangalore, leading up to a Post Graduate Diploma in Management (PGDM), is one of the most popular courses, It helps the students with the skills and capabilities to enable them to reach responsible global positions in management. The PGP revolves around the principle that world-class business leaders are not mass-produced; they are nurtured and developed with personalized care and attention, in small work groups and teams, and in a practical, application-oriented, user-friendly environment while at IIM, Ahmedabad. Post-Graduate Programme in Management (PGP) flagship programme of IIM-A is rated as the toughest MBA programme in the world to get admission. The programme equip students with the required conceptual and interpersonal skills and sense of social purpose for managerial decision-making, it also helps in developing the leadership capabilities to act as change agents and be a source of motivation in the organizations they work in.
Fee structure:-
Indian Institute of Management Ahmedabad (IIM-A) has increased the fee for its flagship two-year postgraduate programme in management (PGPM) from Rs 18.5 lakh to Rs 19.5 lakh.