S/4 Hana Integration

Dear Community,

integrating CCO FP12 PL06 with S/4 Hana:

What makes the difference between the Outbound Services WPUBON and WPUFIB on one side,

and the SOAP Transactions Financial and Sales on the other side for Integration?

I use S/4 with Retail License.

What is the best coice for implementation? Are there advantages and disadvantages?

Thanks in advance

Andreas