"The cups we send out as samples are about 10% softer (shore 30°) than the ones for sale (shore 40°)."
Very interesting! So they are sending me a non-sample small cup to test out, so I can see the difference. So I'm assuming the proper (for sale) cups are thicker perhaps. It will be interesting to see what difference that 10% makes and the smaller size. I'll be able to take side by side pics of the sample and proper cup too so you can see if there is any visible difference.