Both of these action work in conjunction with Reveal Layout.
Reveal Toggle is the main action for that Layout. It toggles the Top Panel. You don't need to indicate by how much the panel needs to be move. The Toggle does is automatically.
Reveal Move is only used in particular cases where a simple Toggle isn't enough. The Move action allows user to specify by how much the top Reveal Layout panel moves and in what direction.
Use the Reveal Tutorial app to best understand how the Reveal Layout is set up.