The main difference between 20-fruit and 30-fruit dragon fruit is the size, as follows:

The diameter of the 20-fruit dragon fruit is about 10 cm, which is a small fruit.

The diameter of 30-fruit dragon fruit is 12-15 cm, which is a medium-sized fruit.

In addition to size, they may also have certain differences in taste, nutritional value, etc. In terms of taste, the 20-fruit dragon fruit may be sweeter and has higher nutritional value. In terms of nutritional value, dragon fruit is rich in vitamin C, dietary fiber, and various nutrients. However, the nutritional content of dragon fruits of different varieties and origins may be different.

In general, the main difference between 20 and 30 dragon fruit fruits is the size, and the difference in other aspects may not be obvious.