The Marigaux 1 SuperLeggera has exactly the same dimensions as the traditional Marigaux 1 staple, which means that the normal Marigaux 1 mandrel fits these staples too.
The Marigaux 1 SuperLeggera - like the Marigaux 2 staple - is made of a considerably thinner material. This means that there is less material which needs to start vibrating; this distinctly reduces the effort required to play.
The staple is particularly suited to those oboists who like the dimensions of the Marigaux 1 staples but are looking for a lighter and more airy feel when playing.