If you look at the IF drawing above, the outline of the folded bike falls along 2 intersecting tangential wheel lines. Look at the Cadenza and imagine the same tangential lines; that shows it seems quite a bit larger.
But there are other good benefits than just the small size: Ability to roll the folded bike on the wheels, and the protected drive train. These were specific design goals, so the rolling ability is not accidental like on many other folded bikes.