Hi Swapnika,
http://scn.sap.com/thread/1257537
the last entry gives a great summary of ECC vs ERP
A few years ago, SAP stopped shipping functionality changes through support packages.
Now support Packages contain purely code fixes and no changes to business functionality.
Changes (enhancements) to business functions are now delivered via Enhancement Packages:
http://www.sap.com/solutions/business-suite/erp/enhancement_packages.epx
You can find the changes to functionality between EHP levels using the following tool at:
http://www.sapsolutionbrowser.com
Hope this helps answer your query.
Best regards,
Paul
