What is the difference between ROR and ROI and how can they be used to measure the success of a project or investment?

Return on Revenue (ROR) measures the profitability of a project by comparing the revenue generated to the costs incurred, while Return on Investment (ROI) calculates the efficiency of an investment by comparing the gains to the initial investment. Both metrics can be used to assess the success of a project or investment by providing insights into its financial performance and overall effectiveness.