VPS and VDS – is a service that provides the user with a virtual dedicated server. VPS or VDS owner has the ability to remove or edit any files, install, configure and modify the installed application software, which is available. This tariff plan offers a guaranteed minimum system resources.
Same machine can run multiple virtual servers, each of them provides an independent and full control, management, as usual dedicated server. It has its own resources, processes, configuration and separate administration.
Each VPS and VDS has its own copy with rights and root access on Unix or Administrator for Windows.
VPS - you are provided with part of the big machine, but with limited options. You can store on your server an unlimited number of databases running on MySQL, mail, FTP, as well as to deploy a large number of web-pages, to install any software.
VDS only differs that the software is installed first to create a virtual machine, such as Xen, and only then the OS. Since Xen is running in virtual mode, it can be assumed that the VDS is still better VPS, but still there is no noticeable difference between the two.