The pattern of stars called the Constellation of Orion has been known since ancient times, and that constellation is now well defined. It is not the pattern of the stars that is different, it is the accompanying myths about the constellation.
The constellation has been a part of cultural mythology for a long time, and the myths are different for each culture. To read about those myths, please open http://en.wikipedia.org/wiki/Orion_(constellation), where you will find a summary. The myths often result in different depictions of Orion.
