I live across the pond so cannot say what your coinage comes up on your detector,but as a general rule i for the most part go by audio its far more reliable than what any screen will tell you and also at much greater depth as well.
Would never make a dig/no dig decision solely what a screen tells you,in the UK most of our desired silver hammered coins dont have a consistent say silver content or even gold when related too gold coinage or even artefacts and often can show up on TID on the screen as say silver foil or bottle tops,so this is the main reason why i dig everything that gives a decent 'audio' signal and never just rely on what a screen tells me,of course if a target is deep be it a coin or artefact and it cannot trigger the TID or even the audio channel then this is why its also wise to listen for the very whisper low audio threshold tone as that can indicate a deep possible desirable signal that you would have left in the ground.
Of course we all detect different and use a detector differently as well,so i can only comment on how i do it.