MBA in business analytics and MBA in IT are two different specialisation but of we consider them, then there's not much difference as MBA in IT refers as a whole study of IT management and MBA in business analytics refers to the managing and maintaining the data generated.
If we talk about current scenario, the MBA in IT is not that famous as business analytics and also MBA in business analytics has the great potential and bright future.
Every company need data analytics employees.
It'll be definitely great career choice
I hope this information would be helpful for you.
All the best