Here's another way to look at it, that I hope is helpful. There's nothing that you can do in a WSM that you can't do in a PBC, but there are definitely things that you can do on a PBC that you can't in a (18.5") WSM.
- Cook eight slabs of ribs at once
- Cook at higher temps
- Cook pizza (killer)
- Cook 12 Cornish game hen halves (requires extra hooks)
- Not clean a water pan
- Not clean grates (unless you use it - the hooks go in the dishwasher)