Beef liver and pork liver have their own advantages in nutritional content and nutritional value, so it is impossible to simply judge which one is better. The following are their main differences:

1. Protein content: The protein content of beef liver is slightly higher than that of pork liver.

2. Amino acid composition: The amino acid composition of beef liver is more complete and easier to be absorbed and utilized by the body.

3. Vitamin content: The contents of vitamin A, vitamin B6, vitamin B12, folic acid, riboflavin, etc. in beef liver are higher than those in pork liver.

4. Mineral content: The iron content of pork liver is slightly higher than that of beef liver, but the content of copper, zinc and selenium in beef liver is higher.

5. Fat and cholesterol content: Beef liver has lower fat and cholesterol content, while pig liver has higher fat and cholesterol content.

To sum up, choosing between beef liver and pork liver depends on personal eating habits and physical condition. If you need a lot of vitamins and minerals, beef liver would be a good choice; if you need a lot of protein and iron, pork liver is more suitable. No matter which liver you choose, you should pay attention to eating it in moderation and cleaning it to avoid excessive intake of fat and cholesterol, so as to achieve better nutrition and health effects.