Airsonic Advanced is a more modern implementation of the Airsonic fork with several key performance and feature enhancements. It adds and supersedes several features in Airsonic.
Please refer to the container Application Setup documentation. Note that upgrading from Airsonic to Airsonic-Advanced is not officially supported, however it may work. Be sure to backup your config folder before attempting an upgrade. After making a backup, you may be able to copy your Airsonic config to the Airsonic-Advanced config folder, and see if the container logs report any issues.