B&B makes specific species lump charcoal. It is actual pieces of trees that are burned in a special oven to make the lump.  It is not a mix of different hardwoods.  So that means Oak lump only contains Oak, hickory is just hickory, and so on. 

After we process the Oak lump, we take the smaller pieces and form them into our briquettes. There are no minerals, accelerants, sawdust, or chemicals in our briquettes. 

Lump burns hotter with more smoke flavor.

Briquettes burn longer with more temperatures predictably

Each have their pros/cons. 

We like briquettes for steaks, with wood chunks.

Lump is good in offset smokers and Kamado style grills.