1. A computer-implemented method for providing a comparison of various website visitation data, the method comprising: displaying a first report comprising website visitation data; in response to receiving user input to filter the first report based on filtering criterion, displaying a filtered report comprising filtered website visitation data corresponding to the filtering criterion; and in response to receiving user input to activate a comparison report, concurrently displaying: the filtered report in a first display area; and the comparison report in a second display area visually distinct from the first display area, the display of the comparison report comprising one or more rows of data each corresponding to a given metric, wherein each row of data comprises: a first set of website visitation data from the first report in a first column, wherein the first set of website visitation data comprises an unfiltered value for the given metric corresponding to the unfiltered website visitation; and a second set of website visitation data from the filtered report in a second column adjacent to the first column, wherein the second set of website visitation data comprises a filtered value for the given metric corresponding to filtered website visitation data; and in response to receiving user input to adjust the filtering criterion associated with at least one of the first report and the filtered report, dynamically updating the second set of website visitation data according to the adjusted filtering criterion and dynamically updating the display of the comparison report based on the updated second set of website visitation data.