The CASE core files would be common across all supported Async OS versions, the content rules check for updates every 5 minutes.
The CASE core files would only update when a new version is released.
You can check the updater_logs to see if the updates are successful or show failures.
As long as the updates are working you would see the latest available version for all scanning engines.
There isn't a link where they are listed separately.
Regards,
Libin Varghese