1, with different shapes: cowpea is generally long, while red bean is lentil-shaped.

2. Different nutritional values: Cowpea is rich in protein, dietary fiber, vitamins and other nutrients, while red bean contains more dietary fiber, calcium, potassium and other nutrients.

3. Same treatment for different diseases: cowpea can be used for adjuvant treatment of diseases such as diarrhea due to spleen deficiency, increased leucorrhea, enuresis, and red bean can be used for adjuvant treatment of diseases such as red and white dysentery, carbuncle, swelling and sores, intestinal carbuncle and abdominal pain.