Hi Gagandeep,
Good Day!
I suggest you to do both! If I am there in your situation. I will join "MBA" Correspondence and continue working in SAP PI. During weekends you need to attend the class. If you joined distance education then I suggest you to go for weekend training in training institute which will help you to complete MBA and you will also get good experience in SAP PI simultaneously. I request you to think about this suggestion. If I am there in your situation. I am 100% sure that I will do both of them. I am not ready to waste my career and simply wasting two years. If you don't have Job, then I would have suggest you to go for MBA. Already you have good job and that's also in SAP PI. Thats why I suggest you to do both of them. All the best for your career growth, SAP PI (My favorite module) & MBA.
Regards,
Hari Suseelan