They have almost the identical function, which is to create a remote session < RemoteSession > with < locale > and < timeZone >.
For the meaning of < intendingOperation > and < designatedHost >
Please note that the following Flow would be run under the same session, which means in the same host server, called session affinity. So here < intendingOperation > means a logical group name, and it could refer to lots of Flows.