Expert Floor 16 has no level similar to it. It is one of the most difficult ones as you have to cross lots of slanted holes and the goal is in a difficult position to get into it. In Super Monkey Ball Deluxe, this floor is given an 8 out of 10 difficulty rating and is named Floor Slant.
The goal is at the far corner of the board in a tricky position. Because of this, the floor is quite difficult.