SAP PI 7.3.1++B2B Modules

Hi,

Please clarify the following.

1. Difference between 7.3.1 vs 7.3 (Am looking for only Dual stack)

2. Currently we use EDI modules and XSD provided by AEDAPTIVE and they support only till 7.3.

If i go for SAP supplied built in adapters, do we need to redo the mappings as I am not sure whether the XSD will change or not in respect to EDI mappings and modules.

Regards

Anandh.B