is that equivalent to sap_crm_eco_webshop_manager
As far as I know, the roles are the same, however, I would prefer to use the "eco" role rather than the "isa" role.
In SAP CRM 2007 onwards, the sap_crm_isa_webshop_manager does not exist.
In order to get a proper technical comparison, you can further confirm this for yourself by comparing the roles in tcode - SUIM.
The sap_crm_eco_webshop_manager role is to be assigned to the Internet User who is responsible to create other Internet users, who will be logging in to the B2B webshop. In short, it is the B2B ISAUSERADM (User Administrator) who should be assigned this role.
Hope it helps.
Thanks & Regards,