I haven’t tried Baikal but it seems to have (from the screenshots) just a bit more features. Radicale is merely the calendar+contacts+tasks server. You can login through the web UI to create calendars and delete them. They are then managed by a calendar/contact/task app like thunderbird. Baikal seems to have settings and a dashboard in the web UI which Radicale lacks.

Both seem to have an unofficial docker container if you’re into that.