Steering side of jet boat?

I have read several questions and answers about why many boats have the steering and hand controls on the right (starboard) side . The answers generally have to do with tradition, international sailing and an attempt to counter the rotation of the motor (especially in small high powered boats).

However, I have noticed that many (not all) jet boats are built more like automobiles with steering on the left (port) and foot throttles. This is more common on the bigger high powered jets. What makes jet boats different ?