How does the .NET Framework Client Profile Preview correlate to the full .NET Framework?

The .NET Framework Client Profile Preview is a subset of the full .NET Framework 3.5 SP1. The Client Profile Preview subset does not contain any assemblies that are not found in the full framework. In addition, the deployment of the .NET Framework Client Profile Preview will also allow users to update their computers to the full .NET Framework 3.5 SP1. The .NET Framework 3.5 SP1 will be a critical update to .NET Framework 3.5, pushed out to users via Windows Update. On Windows Vista and later versions of Windows, the Client Profile Preview setup bootstrapper will install updates to the full framework as needed since those versions of Windows already have the full profile of the .NET Framework.