A volume clone is a usable copy of the source volume; it can be attached to a server and used immediately. A volume snapshot cannot be directly used as a volume; you must create a volume from the snapshot and then attach that volume to your server. Snapshots are stored redundantly in Cloud Files. However, creating a volume from a snapshot is a slower process than creating a volume from a clone. If your application is time sensitive, consider using volume cloning.
For instructions on volume cloning, see How to Create a Clone of a Cloud Block Storage Volume.