Hello Kriti,
The Lavasa branch of Christ University has lately been established around 5 years ago, and the administration has started to set things and infrastructure lack proper development, hence, it lack expertise too.
For a management student, industry interaction and networking while pursuing the course matters alot which is certainly not available at Lavasa (it's a man made tourist city, meant to be the Italy of India).
Moreover, they're offering PGDM, which is a diploma course, while in the main campus, you'll be provided with a degree course.
If you are keen on pursuing management from Christ University, then you must consider main campus.
Good Luck!