Enterprise 2003 & Enterprise 2004

Hi SAP Gurus,

IS there any difference between Enterprise 2003 & Enterprise 2004 in SAP.To my understanding ERP 2004 refers to SAP Release 4.7 * 110.

If there is no diff ,then both ERP 2003 & ERP 2004 refer to 4.7?

IF not then pls specify what release , ERP 2003 & ERP 2004 individually refer to.

Thanks in advance.

Regards.