From my years of experience with bit coal in a wood / coal insert. Bit coal is cheaper by the ton ($60 a ton) but noticibly softer.
It burns with a yellow flame as opposed to the nice blue flame you see at the top of the page. (anthracite) Bit burns yellow because of the impurities in it like sulfur which REALLY stinks (ROTTEN EGG SMELL
) and I've also noticed alot more "clinkers" (lumps of fused ??????? who knows what that cloggs grates and is wasted weight) with the cheaper grade coal and Bit also has WAY less BTU'S and shorter burn as opposed to Anth. Burning bit inside will make you understand how much it can stink if you have a leaky gasket in dead of winter or have to load every 6 hours.
We switched the insert out for a LL Pocono stoker with coal-trol and will never look back. It takes rice anth. and we get it bagged by Blaschak (Santa Claus coal as the kids say) by the ton delivered ($320 for 2400 lbs in western PA)
If you try the Bit coal you may or may not be happy as well as your neighbors who will notice the difference in the type of coal you burn by the smell in the neighborhood. Anthracite burns hotter, longer, cleaner by far with less problems (bridging can also be a problem) and destroys the myth that coal is a dirty fuel source that is messy and stinks.
Times are hard and there is a huge gap in price so if you need to save the money, it's possible to use the Bit coal but the difference is night and day which pretty much explains the difference in price. BTW you can get it from the breakers locally and save a bunch if you have one near you. We don't.
Hope this helps,