Both were working from the concepts of the great HR Giger. All the best.
I know , I still have some artbooks published by Taschen purchased years ago ...Giger was one of the first artists that inspired me to do airbrushing! ... for "Aliens" the alien Queen was designed by James Cameron and Stan Winston based on Giger's artwork. Giger wasn't involved on the movie, unfortunately ... as far as I know he was credited obviously but he did not received any money !!