Reindeer and caribou are similar in appearance and behavior, but there are some key differences. Reindeer are domesticated and raised for their meat, hides, and antlers. They are also used for transportation and pulling sleds. Caribou, on the other hand, are wild animals that roam the Arctic tundra. They are adapted to the cold and can survive in harsh conditions. While they share many physical similarities, their lifestyles and habitats are very different.