From their FAQ page:
7. What's the difference between 3D print and resin?
Polyamide (3D print) and polyurethane (or resin) are two different materials. Printed cats are lighter but they have interesting texture to them. The gradients on polyurethane are airbrushed, while for 3D printing we use a combination of airbrushing and dyeing.
The velvety matte finish you can see on prints is a natural texture. We used to polish all prints, but now we don't, because once polished, it's impossible to apply dyes uniformly. And we like the texture too.)
Since we do dying on prints, colors penetrate the material and they don't wear off easily. The colors are pretty reliable. For polyurethane on the other hand we don't put any tinting on the joints.
Polyamide (3D print) is a very strong material. Very hard to break. And printed dolls hold a pose better because of the texture. Resin on the other hand is preferred by some of our customers, because it's smooth, slightly heavier and it feels nice.
Check out their website and Flickr for more FAQs and more pictures.