ROS vs SLC Which one to choose and why?

Hello Forum,

We are implementing SRM 7 for catalog based procurement in classic scenario with ECC 6.0 EHP 5 as backend.

We also want to go for Supplier Registration (On borading) and Supplier Assessment (Performance Management).

From registration perspective SRM ROS and SLC seem to have similar functionalities like webofrms, questionnaires etc.

What are the major differences between SRM ROS and SLC? For e.g. differences in UI, workflows, deployment options, is BI mandatory with both for performance management, what is the future road map of SAP on this?

Which one is preferred option and why?

Please share your opinion and expertise.

Thanks,

Anubhav