* Size: 2-4 tons
* Height: 6-8 feet at the shoulder
* Diet: Carnivore
* Habitat: North America, Eurasia
Arctodus Simus
* Size: 1-3 tons
* Height: 10-12 feet at the shoulder
* Diet: Carnivore
* Habitat: North America, South America
Comparison
Amphicyon and Arctodus Simus were both large, carnivorous mammals that lived during the Miocene epoch. Amphicyon was a member of the family Amphicyonidae, which is now extinct. Arctodus Simus was a member of the family Ursidae, which includes modern-day bears.
Amphicyon was smaller than Arctodus Simus, but it was more robustly built. Amphicyon had a shorter neck and a more massive skull than Arctodus Simus. Amphicyon's teeth were also more robust than Arctodus Simus's teeth.
Amphicyon was a more cursorial animal than Arctodus Simus. Amphicyon had longer legs and a more flexible spine than Arctodus Simus. Amphicyon was also a more agile animal than Arctodus Simus.
Fight
In a fight between Amphicyon and Arctodus Simus, Amphicyon would have several advantages. Amphicyon was smaller, but it was more robustly built. Amphicyon also had more robust teeth and was a more agile animal.
Arctodus Simus would have one advantage over Amphicyon. Arctodus Simus was larger than Amphicyon.
Ultimately, the winner of a fight between Amphicyon and Arctodus Simus would depend on a number of factors, including the size of the animals, their strength, their agility, and their fighting skills.