The difference between four-headed abalone and two-headed abalone is that the number of heads is different and the value is different.

First, the number of heads is different

1, four abalones: four abalones means four abalones per kilogram.

2. Two abalones: Two abalones mean that there are only two abalones per kilogram.

Second, the value is different

1, four abalones: the price of four abalones is cheaper than that of two abalones.

2, two abalones: The fewer the number of two abalones, the bigger the abalone, and the more expensive it is.

Extended data

The number of heads is an important criterion to identify the grade of abalone. The size of abalone is calculated by the number of heads per Sima Jin (604.79 grams). As usual, there are 5 abalone, that is, there are 5 abalone per catty.

The number of abalone refers to the size of abalone, which is calculated by the number of abalone per Sima Jin. If it is two per catty, it is called double-headed abalone; Three are called three-headed abalone, and so on. How many abalones are there in a catty? A catty is called several abalones without raw materials. Two-headed abalone is only two abalones per catty, so-called "a thousand dollars can't buy two-headed abalone".