A corporate secretary is a business professional who administers a number of crucial tasks in the ongoing life of a company whereas a company secretary is a professional whose role is that of an advisor for legal matters.

The functions of the corporate secretary are very wide and involve the need to exercise considerable authority in a wide range of tasks.

A corporate secretary assists the efficient management of a corporate body, while the company secretary is an expert in business supervision.

(http://entrance-exam.net/difference-between-company-secretary-and-corporate-secretary/#ixzz6MWbM0UW7) I hope this clears your doubts.