A rider can't get off their dirt bike and float it across four feet of water, but a BW rider can.
A dirt bike needs speed and suspension to tackle a steep hill. A BW just needs a Wooly Booger and whatever speed the rider chooses.
A BW is like riding a ATV and dirt bike at the same time. In other words, they handle like the rider has no idea where they are going.
In a fun way.