Any stained glass pattern can be fabricated in mosaic. In stained glass, mosaic is not a design style, it is a method of fabrication, in the class of lead came and copper foil. The only changes in design is the criteria for choosing glass. Mosaic is much less labor intensive. No cutting or stretching lead.
Materials costs are much less.
No solder, lead or foil. And mosaic is safer. No flux, no fumes, no lead. When the French Rooster Restaurant needed to cover an opaque wall, Roy was ready. He used a highly professional and technically sensitive space-age adhesive called Elmer's Glue to hold the glass pieces in place, and common tile grout.