Bernard did a post about a new TechNet article “IIS 7 Features Overview”. The article gives you a great picture on the different IIS features available in the different Windows versions.
Windows Server “Longhorn” has all the IIS features you need to support hosting of Web content in production environments. Windows Vista also has IIS features, but the available features depend on the version of Windows Vista. IIS in Windows Vista is ideal for those who want to build and test Web applications.
Read the full TechNet at source.