My understanding has been that soapstone provides more of a gentle heat compared to cast iron. Recently, however, I read a post that said people were blasted out of a room because of the heat from a soapstone stove. Is there really a noticeable difference between the heat that is felt from soapstone vs. cast iron? Or is the main advantage to soapstone the retention qualities of the stone itself? Also, in terms of spreading heat into other rooms, are soapstone and cast-iron equivalent, with only a convection stove or insert doing a better job?