Ferret or Hamster are both small, furry animals that make popular pets. Ferrets are members of the Mustelidae family, which includes weasels, otters, and badgers, while hamsters are part of the Cricetidae family, which includes rats and mice. Ferrets are more active than hamsters, and require more space and exercise. They are also more social and can be trained to do tricks. Hamsters, on the other hand, are solitary animals and need less space and exercise. They are also nocturnal, so they sleep during the day and are active at night.