In windows VPS plan, you will get virtual dedicated server with Administrator privileges and dedicated resources. You will have Remote Desktop Access [ RDP ] through which You can deploy applications, web server, mail server, database server and you can manage the server at your end.

Where as In Plesk windows VPS hosting plan, you will get virtual windows dedicated server with Plesk Web Hosting Control Panel installed. You can host and manage multiple websites using Plesk Control Panel. The server will be provided with dedicated resources, Administrator privileges and Remote Desktop Access (RDP) along with Plesk Control Panel.