If you're trying to determine which brand and model of shoe might be best for you, I would look at outside, unbiased source that provides consumer and expert ratings for the shoes. One such source is "Runner's World Magazine," which does a running shoe guide each year that breaks down all the relevant features in the newest running shoes. Additionally, their website has a shoe search function where you can plug in the desired manufacturer (Brooks), the type of running you do (marathon, rehab, fitness, light jogging, etc...), and a variety of other features like flexibility, weight, cushioning in the heel and forefoot, etc..