In vSphere 5.5, a Host Profile, once created, would still be related to the reference host. New configuration changes should be made to the reference host and pushed to the Host Profile. Starting with vSphere 6.0 this is no longer the case; the extracted profile is independent of the host it was extracted from. Due to this independence, you can now copy settings between Host Profiles. Read the recipe, Copying settings between Host Profiles for instructions on how to achieve this.