Hi,
There is much difference between 4.6c and 4.7e as far as working is condition only thing there is some new OSS notes added by SAP in 4.7e.
There is a very good Weblog from Thomas Jung called "ABAP 46C to 640 Delta Training" here in the SDN.
/people/thomas.jung3/blog/2005/05/15/abap-46c-to-640-delta-training
It contains a very good document with many hardcopies of the new features.
When your Enterprise 4.7 works on a WAS 620, not all features like ABAP Unit are available.
Please check this link to find out delta between two different SAP version.
http://solutionbrowser.erp.sap.fmpmedia.com/
Also, check the below links:
http://www.absoft.co.uk/absoft/web/site/AbsoftSAPServices/Upgrade.asp
http://www.thespot4sap.com/articles/SAP_4point7_Features_Benefits.asp
Regards,
Padmam.
