The differences in gas vs coal.
The coal has adjustable top vents.
Gas only has fixed vents.
The gas has a flavoriver bar and holes in the bottom under the gas tube.
So coal is going to drop out those holes unless you cover it with something.
There are a few more details..
My guess is that if you want charcoal, get a charcoal one.
If the wood handles are what you are after, buy the gas. Then buy a charcoal one and switch the handles. Then clean and sell the gas one for a profit!