Is there any difference? : What is the difference between vvsb &vvism?

Nothing. It is the same college known by two acronyms - VVSB

Vishwa Vishwani Institute of Systems & Management (VVISM) offers a Two-Year PGDM Program autonomously, whereas Vishwa Vishwani Business School (VVBS) is affiliated to Osmania University and approved All India Council Technical Education-New Delhi for offering PGDM degrees in Management. 

Both are owned & managed by the same group.