The main difference between MBA and PGDM is that MBA is a degree and is offered by universities, whereas, PGDM is a post-graduate diploma offered by AICTE approved institutes.
Indian universities come under the University Grants Commission (UGC) and can, therefore, award degrees like the MBA degree, also known as MMS in Mumbai. Universities follow the UGC format for course content. On the other hand, reputed management institutes design their courses based on industry feedback and business relevance. They are not covered under the UGC.
Importantly, when it comes to job opportunities, institute reputation matters more than the name of the degree or diploma.

Consider the following parameters before selecting an institute for taking MBA admission: Accreditation of the institute, institute's infrastructure, teaching faculty, specialization offered, past placements records, tuition fees, city preference, industry interface

An MBA in Information Technology Management is a good combination of two very dynamic aspects of any business : Management expertise & information technology. The prospects appear bright, as:
1. Almost every national and international company of repute is always looking for competent and qualified professionals to help them cope with the dynamic business environment.
2. MBA (IT Management) graduates can climb the corporate ladder faster, with career options in any of the following fields within IT management: Business/IT Alignment, IT Governance, IT Financial Management, IT Service Management, IT Configuration Management.