1. Price and quantity: Generally speaking, natural fish roe is more expensive than synthetic fish roe, because natural fish roe comes from wild fish and the cost of synthetic fish roe is lower.

2. Nutritional value: natural fish roe is a pure natural and pollution-free green food with high nutritional value; The synthetic fish roe is made by artificial processing, although the taste and appearance of the fish roe can be maintained, the nutritional value may be lost.

3. Source: The natural fish roe comes from wild fish, while the main source of synthetic fish roe is farmed fish.

To sum up, there are some differences between synthetic fish eggs and natural fish eggs in terms of price, quantity, nutritional value and source.