Welcome to Avatar Answers. What would you like to know?

None they are completely different universes, the only thing they share is that both organizations are portrayed as ruthless with a strong emphasis on profit and little regard for the life of others.

Weylan-Yutani is not a creation of James Cameron the company was in the first Alien movie which was created by Ridely Scott, although Cameron did flesh them out and give them a more prominent role in his sequel Aliens.