Cloud VDC use redundant SANs (Storage Area Network) to store the virtual machine’s data.
The SANs are large disk appliances that are not physically attached to the host node that the virtual machine is on. What this does is allow for your VM to be booted on a spare hardware node in the event that the host node goes offline. In short, higher availability for the server.
The Standard VPS plans use local disks, much like a standard desktop computer, so in the event that one of those host nodes goes offline the data cannot be retrieved to boot your server up on a spare node.
Cloud systems are incredibly customizable.
You can pick your resources A’la Carte, in millions of different configurations. This flexibility, combined with the ability to host multiple VMs inside one cloud tends to be more economic, and easier to manage.
The Standard VPS plans have far fewer customizations available and in almost all cases you would need to upgrade the entire plan level in order to increase a single resource.
Clouds can host both Windows and Linux virtual machines.
The Standard VPS plans are only available in Linux. If you need Windows the Clouds are the only choice.
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