The ceramic is about the same, the real early sulphide figures used a mix of gum aribic, powdered base glass and some other crap - to much for me to mess with to be honest.
With ceramics and glass, each has its own coefficient of expansion, and viscosity. Finding a good balance between both materials is very important. If one or the other is to far out of line, then the piece wont hold up. If there was to much air trapped inside against the figure, that could have been what allowed the horse to survive. Cool piece to add to any collection never the less. I had an owl from an old sulphide, not sure where it got to... hmmmm Ill have to look.