I posted a pic of the copper one.
I have a Grill Dome. I really like it. I went with it over the BGE because I liked the color choices, ceramic is little thicker and the base and the lid are both machined for the gasket. I haven't changed a gasket since I bought mine. Same warranty as BGE, lifetime. Also the price I got on mine was a major factor.
I drove 22 hours round trip from PA to New Hampshire to buy a brand new G.D. for $200
Anytime I needed anything I called and got replacement with no issues.
Years back they had some paint problems in the colors but that has been resolved.
Also not sure if the BGE I used were setup correct but the auto hinge on the Grill Dome is much better than the hinge on the BGE. The Grill dome is light as feather to lift the lid. Not that egg is heavy, they G.D. is just so light.
I think any ceramic will do a great job.