At first glance, the bulk of statistical information in Progressive Grocer's Super 50 report appears similar to last year, but a deeper look shows there are clearly plenty of change afoot within the ranks of these leading players, many of which are presently immersed in aggressive campaigns aimed at redefining their brands - and reasserting their cost/value propositions - for shoppers. The Progressive Grocer Super 50 report examines a variety of benchmarks to track these changes, including store count, ACV, selling area, banner names, chief trading areas, number of employees and checkouts.