What is the difference between models Marte and Giove?

Pop-up basket wastes Marte and Giove have the same design, but their basket plugs have two different configurations in open and closed position.

Models Marte and Giove are only available in pop-up version.
Mercurio 
Saturno, instead, are available in both pop-up and manual version thanks to an opening on the steel plate of the basket plug.