Customer/Vendor creation in CRM (with replication to ERP)

Hello SCN experts!

My task is creation BP for customers and vendors in SAP CRM system. After I should replicate them to ERP (ECC) and automaticaly create Customer and Vendor with all relevant data (like Company Data for Customers and  Company Data /Purchasing organization for Vendors).

I know 2 different ways for it:

1) Customer Vendor Integration (CVI) Customer Vendor Integration (CVI) - SAP Documentation

2) "Simple" what is described here Configuration for vendor master data exchange ECC <---> CRM

Can anybody help me choose correct way and maybe explain some more info? Or it is the same ways?

Thanks

Johny