Cisco WLC Deployment Models

Hello everyone.

My book describes the following:

Catalyst 9800 Embedded Wireless for a Switch
Catalyst 9800 wireless controller software for the Cisco Catalyst 9300 switch brings the wired and wireless infrastructure together with consistent policy and management. The Cisco Catalyst 9800 embedded wireless controller software package can be installed on Cisco Catalyst 9300 Series switches to enable wireless controller functionality for distributed branches and small campuses.

Catalyst 9800 Embedded Wireless for an AP
The Cisco Embedded Wireless Controller on Catalyst Access Point (EWC-AP) is a next generation Wi-Fi solution that combines the Cisco Catalyst 9800 Series wireless controllers with the latest Wi-Fi 6 Cisco Catalyst 9100 access points.

Cisco Mobility Express
This is a reliable and affordable wireless solution for enterprise branches or small
to medium-size businesses that want a managed AP solution without being required to buy, maintain, and manage a separate WLAN controller appliance. Cisco Mobility Express is a virtual wireless LAN controller that is integrated into an access point. By default, all access points run the Cisco Aironet CAPWAP image.

What is the difference between EWC and Mobility Express? Is EWC the more modern option for 9800 WLCs while Mobiliy Express was for older APs/AireOS WLCs?

Thank you.
David