In general, cabbage does not taste exactly like lettuce. While they are both leafy green vegetables, cabbage has a slightly more bitter flavor than lettuce. Although, when I take cabbage in a sandwich instead of lettuce, I find it to taste similar but a little peppery. Some people also say that cabbage has a stronger flavor than lettuce. Cabbage also tends to be crunchier than lettuce, which some people may prefer. Ultimately, it is totally up to the individual to decide whether or not they enjoy the taste of cabbage or lettuce.