UPDATE: As of 2021, GEO Jobe has transitioned from recommending Admin Tools for ArcGIS to Backup My Org when it comes to migrating items, users, and groups from one organization to another.

Copy

This tool creates a new item as a pointer to the original source. This tool is useful for multiple users all working on the same content. It is available in of Admin Tools for ArcGIS.

Clone

This tool creates brand new items, with its hosted dependencies configured automatically, and no longer pointing to the original data source it was cloned from. This is a very useful tool for moving content into a new organization. The Clone tool is available in Backup My Org.

Related articles

• Page:
  If You Are Cloning Services That Are Registered To A Different Data Source (Historical)
• Page:
  How To Clone an Entire ArcGIS Organization (Historical)
• Page:
  Admin Tools Cloning (Historical)