It also borrows the latter’s audio interface that gives you a central hub for all audio settings.
There are of course headphone and mic jacks, but the S5 II now offers 4-channel recording via the DMW-XLR1 hotshoe audio adapter, just like the GH6. It also now uses a full-sized, rather than a micro HDMI jack as before, making it far more reliable when using an external recorder. That allows for faster transfer speeds and more reliable backups, if you like to shoot video to two cards at once. Another welcome update is two fast UHS-II card slots, rather than one UHS-II and one UHS-I slot on the S5.