They've added all that brand ID since they started to give public tours. Interesting.
I think there are some specification differences in the barrels they make. Woodford, I think, is the only one for which they char the barrel heads.
Brown-Forman used to supply barrels to other distilleries but now, as a general rule, they do not. It's mostly a capacity thing. They need all they can make for their own brands and to make more, they would need to do a significant expansion of the facility, or build another one, cause they've pushed that place to the limit.