Efficiency : the state or quality of being efficient, or able to accomplish something with the least waste of time and effort; competency in performance.  accomplishment of or ability to accomplish a job with a minimum expenditure of time and effort: The assembly line increased industry's efficiency.

Equity :  Equity represents the value that would be returned to a company's shareholders if all of the assets were liquidated and all of the company's debts were paid off. The calculation of equity is a company's total assets minus its total liabilities, and is used in several key financial ratios such as ROE.