See both are completely different courses with different subjects and different interests into it. You can choose what interests you more. MBA also has different fields in it. MBA deals with IMPORVING your management and leadership skills, it teaches you managing things and people around, the finance, accounting, etc and stuff.

Kindly refer to the link below to know more about the same...

https://www.careers360.com/courses/mba-master-of-business-administration

MSC in criminology is more about forensics and learning criminal related proofs and evidences. It tries to control crimes in the society.

https://university.careers360.com/colleges/list-of-criminology-and-forensic-law-universities-in-india

Best wishes. Thank you.