-Actually, the two enamel pins are exactly made in the same way until the enamel paint. Both the two are die-struck out of steel or brass. And the most obvious difference point is the soft enamel pins have textured metal lines with recessed enamel and a non-smooth surface. For the hard enamel pins, they are polished-flat of metal with enamel, a non-textured, and smooth surface.
Both the two enamel pins are hand-made and hand finished. Hard enamel pins are slightly more expensive than soft ones.