1, the composition is different : crab yolk is the female crab's ovaries and digestive glands, as well as not yet had time to discharge to the outside of the body of the egg cells, other organs, glands, tissue fluids and other substances, while the crab paste is the male crab's parasympathetic gland and its secretion.

2, the color is different: crab yellow is orange, crab paste in its natural state is a greenish-white translucent jelly-like liquid, cooked after the translucent, sticky gelatin.

3, the nutritional value of different : crab yolk is rich in protein, phospholipids and other nutrients, but also contains a high level of oil and cholesterol, while the crab paste is rich in protein, fat, phospholipids and vitamins.

4, taste different : crab yolk eat up sandy particles, taste a little like egg yolk, crab paste taste delicate, sweet, chewing will have a special flavor.

Reference to the above? Baidu Encyclopedia - Hairy Crab