1, the aroma is different. Tinfoil duck blood: high-temperature treatment, no bloody flavor, floating with a duck fragrance. Tinfoil pig's blood: there is a slight bloody flavor.

2, different nutrients. Tinfoil duck blood: rich in iron, calcium and other minerals, nutrient-rich. Tinfoil pig's blood: containing protein, iron, zinc, calcium, phosphorus and other elements, protein content is twice as high as pork, containing a variety of essential amino acids and rich iron.