Suite on HANA is ECC running on an SAP HANA database. ECC is a set of ERP tools for core business functions like finance, logistics, warehouse management, and sales and distribution.
Suite on HANA boosts performance, and provides the same functionality as running ECC on traditional disk based databases.
Suite on HANA systems can be upgraded by using S/4HANA add-ons. When ECC users perform a SAP HANA migration without changing the front end, it becomes SAP Business Suite on HANA.
This lets businesses benefit from the performance boost of SAP HANA without restructuring the application layer.