Connecting On premise network to HCI

Hi Experts ,

We are trying to connect an on-premise system from SAP HANA Cloud integration  .

HANA Cloud Connector and Data Service agent would facilitate to expose on-premise system to cloud.

What is difference between SAP HANA Cloud connector and Data Service Agent?

And which could be preferred to connect to SAP HCI?

Thanks and Regards

SaravanaPerumalRaj