What are the differences while connecting to a SAP B2B adapt

Hi All,

We have a scenario where we want to connect to SAP B2B adapter for webMethods v6.5 to SAP system v3.i.

We already have in place connection between SAP B2B adapter for webMethods v6.5 to SAP system v6.0

Now I want to know what can be the differences while connecting to a SAP B2B adapter version X from SAP System v3.i and SAP System v6.0?