Red cabbage and green cabbages share many similarities: they are in season at the same time, you can check for freshness in the same way and interchange them in most recipes.  In terms of differences, however, red cabbage tends to be smaller than its counterpart and has a more peppery taste. Red cabbage also contains more vitamins and antioxidants than green cabbage. Some studies indicate that red cabbage is more effective at fighting inflammation and inflammatory diseases/conditions, such as arthritis [source].