Full time Postgraduate Courses:
If you’re an MBA student, you can be working from 9:00 a.m. to 05:00 p.m. every weekday. Even if those aren’t your hours, the concept is that as a full-time student, you have a daily study commitment of more than six or seven hours.
I think the advantage of these courses is you qualify in the shortest time possible.
Disadvantage is if you have a full-time job, you’ll get no time to study.
Part time Postgraduate Courses:
I have seen that the teaching hours and study time becomes complex to handle for part-time postgraduate students, which can be a benefit or a drawback depending on your circumstances and perspective.
Advantage is if you need to balance your studies with your personal or professional life. Also handy if you wish to alter or advance your job while still working.
One disadvantage, as I see is, it will take you longer to complete the degree and you may not feel that u even a part of the university. I would suggest you to choose accordingly.