Yes, the Xenomorph vs. The Thing fron the John Carpenter remake. Here is a list of each alien's stats:
Height: 6 feet
Powers: acid blood, mouth inside of mouth, tail, jumping, saliva
Weakness: Liquid Nitrogen
Height: Depends on organism it chooses to make itself, 9 ft. if turns into an alien being/god/human hybrid
Weight: Depends on organism it chooses for identity
Ability: Parasitic extraterrestrial lifeform that assimilates other organisms and in turn imitates them, If "The Thing" ever reach's civilization, it would be only a matter of time before it consumes humanity and takes over the Earth, even small pieces of the creature will behave as independent organisms.
Weakness: Flames fueled by a flamable liquid.