The Tyk Dashboard API is a superset of the Tyk Gateway API, enabling (almost) all of the core features and adding many more. The Dashboard API is also more granular and supports Role Based Access Control (RBAC) on both a multi-tenant, and user basis.
With the Dashboard API it is possible to set Read / Write / ReadWrite / Deny access to sections of the API on a client by client basis, and also segregate User / Key / API Ownership by organisation.
Note about API Ownership
For optimal results, it is advisable to exclusively employ the Tyk Dashboard API within a Self-Managed setup, thereby enabling it to handle the Tyk API gateways cluster.