1. Shape difference: There is a red patch behind each side of Brazilian tortoise's eyes, which looks like ears. But doughnut turtles are not behind the eyes, and breeders can judge by the difference in this respect. But the subspecies of the tortoise also don't have it behind the eyes, and the breeder needs to judge by other characteristics.

2. Pattern difference: The pattern of doughnut turtles is round and looks like doughnuts one by one, which is the origin of their name. The pattern on the carapace of Brazilian tortoise is strip-shaped. Although there are circles, not all patterns are round.

3. Habit difference: Donut turtles have higher requirements on the environment, and they are sensitive to environmental changes, especially to water temperature, and their cold tolerance is poor, so they need artificial heating when raising. Brazilian tortoises have strong adaptability, can accept high and low temperatures, and are not particularly sensitive to temperature changes.

4. Life difference: The average life span of doughnut tortoises is longer than that of Brazilian tortoises. Under normal breeding, doughnut tortoises can live for 35-40 years, while Brazilian tortoises can only live for 15-35 years.

Doughnut tortoises and Brazilian tortoises not be raised together. As mentioned above, doughnut tortoises have higher requirements on the environment and Brazilian tortoises have strong adaptability, so they cannot be raised together. Although doughnut turtles are lively, Brazilian tortoises are more lively. When they are mixed together, doughnut turtles are easily frightened.