I think the white lasagna belly and black lasagna belly of the following differences:

1, the color is different: maw itself is black, white maw is processed by hydrogen peroxide into a kind of frozen processed food, black maw nutritional value to be higher.

2, the production of different ways: black maw is not processed, white maw is processed, that is, in addition to the black maw of the layer of black surface layer.

3, different sources: from different diets of cattle.

4, cooking methods are different