Those two furnaces are pretty close to being identical. They are pretty well designed for wood and bit coal right out of the box. They do need some tweaking for anthracite though. I use mine for anthracite although I have experimented with wood and bit coal too. When burning bit you need a lot of combustion air to come in over the fire to burn the hydrocarbons being expelled off the top of the coal bed. I had a couple scary experiences with bit lol. It tends to go nuclear for the first couple hours of the burn then it behaves more like anthracite. Just be careful when you start. There is a specific technique for banking when loading fresh bit so that it doesn't puff back and fill your house with bit smoke. You don't want to smother the fire when loading lol.