When is the cast iron griddle better than the soapstone? in Kamado Joe Posted March 26, 2021 The cast iron is better if you don't want to wait FOREVER to heat up the soapstone. I got the soapstone a few months ago (possibly as much as a year ago but who knows during covid times?) and love the results but I light my grill an hour and a half before cooking to get to searing temp. Am I doing something wrong? Other than that, I use the cast iron in addition to the soapstone when I want a full searing surface, though that's not ideal since they're at different temperatures.