Comparing SQL Server 2005 Editions
In addition to considering the amount of memory supported, the number of processors supported, and so on, also consider the features that are supported by the SQL Server 2005 edition to make sure they meet your needs. The features supported vary based on the SQL Server 2005 edition and, in some cases, the platform (IA-32, IA-64, or x64), but they are independent of the underlying operating system on which SQL Server 2005 runs.
The following sections present the key differences for the Database Engine, Analysis Services, Reporting Services, Notification Services, Integration Services, and Replication features supported by the various editions of SQL Server 2005.
Components that are common across the editions ...