Although the two are part of the legume family and have a similar appearance, they're vastly different foods. Edamame is much thicker than the sugar snap peas, and they might only have a few beans on the inside, whereas the peas have several beans inside the pod. You also open edamame pods to eat the beans inside. While edamame has twice as many calories compared to peas, they also have three times the protein and more potassium.