Which approach to choose SAP PI or Consumer proxy?

Hello Experts,

We are implementing SAP CRM in our landscape. We already have SAP PI in place.

Now to make communication between SAP CRM and third party application, which approach shall we choose?

1. Create Provider/ consumer proxies in SAP CRM and exchange the data with third party systems.

2. Use SAP PI as middleware and exchange data with third party systems.

Please let me know the pros and cons for both of them.

Thanks,

Sameer