An existing Host Profile can be cloned to create a duplicate of the same. This can be achieved by using the "Duplicate Host Profile" operation. Keep in mind that only a Host Profile with a reference host associated with it can be duplicated.
The following procedure will guide you through the steps required to duplicate an existing Host Profile:
Connect to the vCenter server using the vSphere Web Client.
Go to the vCenter Inventory Home tab and navigate to Rules and Profiles | Host Profiles.
Select the Host Profile that you intend to duplicate and click on the Duplicate Host Profile icon:
On the Duplicate Host Profile wizard screen, supply a name and an optional description for the duplicate profile and click on Next to continue:
On the Ready to complete screen, click on Finish to create the duplicate Host Profile.
The Recent Tasks pane should show a Duplicate Host Profile task in progress and a subsequent Create a Host Profile task completed successfully...