At Kenner, they sculpted the figures to final scale then sent them to China. In China, they resculpted the parts at 4 times size then used those to make the tools from. They always lost a little in translation (which is why Mattel never did that) so if you look at those photos, all the heads and sculpted parts are just a little nicer. Particularly, the Gwen head suffered the most. We even planned to retool her head if the second year shipped.
All 3 dolls have blended hair colors. Gwen’s is more subtle but it was part of adding more detail for free that I leveraged as far as I could. I was very careful when picking those exact shades.