Per request of EofA, I am posting Kaya's mold changes here. I discovered them after picking up a cheap Kaya a couple weeks ago and compared her with my original Kaya. The other was made over.
You may not be able to see, but the original Kaya's face is fatter, slightly wider nose and bigger eye sockets. At first I thought the skin color was different, but now that I look again, not so much. But this has been known to happen. Original Kaya was bought new in Chicago I believe the Spring of 2004. As Saqui (modified Kaya) is used, I don't know when she was bought. However, both girls have 2008 body tags, which I thought was really wierd for my original Kaya to have.