Secure Connect is for Meraki customers.
It integrates Meraki dashboard and Umbrella with some features back ported from Secure Access into it. It is very easy and automatic to do the Meraki integration to route traffic in/out to the sites/internet as well as add 3rd party tunnels. It replaces their 'Sigraki' integration.
Secure Access is vendor agnostic.
It will requires effort to connect sites at this time. I believe Cisco is working on making site integration with SDWAN and Meraki automated, maybe FTD as well. Note SDWAN can be automated for egress only tunnel connections at this time 2025-09
Secure Access also has additional features not included in Secure Connect.