The Read Dynamic Variable node takes in a Source Slot and a Path variable name, and is marked as ContinuouslyChanging. The Dynamic Variable Input node uses a Global for Path and binds to spaces in the slot hierarchy it exists in. Therefore, when reading constant-name dynamic variables within the same dynamic variable space of the slot the node exists in, the Dynamic Variable Input node is preferred. When reading dynamic variables from a space outside the node's slot hierarchy, the Read Dynamic Variable node must be used.