Alligator or Crocodile? (Image credit: U.S. Fish and Wildlife Service) The two reptiles are close relatives. But crocodiles tend to live in saltwater habitats, while alligators hang out in ... Jan 19, 2017 · The two species of alligators, the American and the Chinese, tend to be slightly smaller than crocodiles when comparing size and weight. “An American alligator is about 13 feet (4 meters) long. The largest alligators can weigh over 1,000 pounds,” notes author Lisa Bullard in What’s the Difference Between an Alligator and a Crocodile? That’s right, if you spot one Caiman, there is a very good chance there are several others around you…..that you may not see! Caiman vs. Crocodile vs. Alligator. Sometimes telling the difference between a caiman, an alligator and a crocodile can be difficult. Jan 14, 2020 · One of the main differences between alligators and crocodiles is the snout. The alligator's is broader and shaped like a U, whereas the crocodile’s is longer and narrower and more V-shaped.