Here is the description of the different glasses. Of course seeing them in person helps too and you can order Signature and Radiance samples. Many people prefer the simple bold and shiny colors of the Radiance line. But, the Signature line is definitely special. It is not shiny, and the color has a 3-D appearance.
The Jezebel Radiance® line of glass is premium, heirloom quality glass. Jezebel Radiance® glass has streaks of bold, brilliantly intense color with a shiny surface. Glass shades are shaped using a process patented to Jezebel®. This is a stunningly beautiful hand rolled sheet glass. There is no unsightly hot spot from a light bulb. Meanwhile, pure color and light will flood your space with ambiance.
The Jezebel Signature® glass has an unsurpassed complex mixture of colors. Signature® glasses have a rich waxy feel and stone-like texture and appearance. The Signature® glasses are more luminous, richer in color and eliminate unsightly light bulb hot spots. Jezebel holds the patent on her technique. And, because the color is inside the glass and not painted on the surface, there is a remarkable 3-dimensional effect while light is diffused throughout the glass. The complex mixture of colors is difficult to attain in glass. Jezebel Signature® glass surpasses any other for lighting, even that which Louis C. Tiffany made and became famous for from 1878-1938.