Minor difference in vCenter Single Sign On (SSO) server 5.5 deployment

Starting from vCenter 5.1, there is a new component called vCenter Single Sign-On server to simply the authentication across multiple vCenter servers. There is 3 deployment modes as following in vCenter 5.5 :

The first one is very simple. This is the starting point for your to deploy 1st vCenter SSO server.
The 2nd and 3rd one are easily confused as both of them need you to specified "Partner Host name" and password of administrator@vsphere.local.

For "High Availability", this deployment mode requires same Site.

 "MultiSite" mode requires different site name.

The remaining installation steps are the same. The difference is somehow interesting and help you to differentiate "High Availability" and "MultiSite" mode.

Also, in the installation summary, "Multisite" requires configure a new Lookup service while High Available mode does not need that.  This imply that, in "MultiSite" mode, vCenters in each site are registered to different SSO.

Any comment are welcome.