An emu is smaller than an ostrich. Emus grow to be around 6 feet tall while ostriches grow as tall as 9 feet. Emus weigh as much as 121 pounds while ostriches weigh up to 320 pounds. The ostrich is the largest bird in the world while the emu is the second largest.
An emu has 3 toes on each foot while an ostrich has 2 toes on each foot.
The top speed of an emu is 31mph while the top speed of an ostrich is 43mph.
Emus live throughout Australia except for Tasmania. Alternatively, the ostrich lives in Africa.
In terms of classification, emus are in the Casuariidae family and ostriches are in the Struthionidae family.