Tundras are colder.
Deserts are hotter.
Tundras have animals like Arctic Hares, Polar Bears, Caribou, and Snowy Owls.
Deserts have animals like Gila Monsters, Fennec Foxes, Kangaroo Rats, and Roadrunners
Tundras have more precipitation.
Deserts have less precipitation.
They both have lots of different species of animals.
They both have a lot of plants.
They both have living and non-living things.