Moore is a good shooter. He has shown that when he shoots low volumes he can have insane percentages. He has also shown through multiple years that as soon as he is needed to shoot higher volumes, that percentage plummets.
Dante has no track record, because prior to last 2 seasons he never took any threes. So we can only judge on what we have seen, and in the two seasons he has been shooting threes his ability has been abundantly obvious, even with the same volume that sinks Moore's consistency.
There is no evidence to show that Cunningham can only shoot from the corners and that Moore can shoot from anywhere. In fact, if you look at their shot charts, they both shoot essentially the same percentage from the corners, and again, Dante does so on more attempts. Moore made more attempts from elsewhere around the arc, but his actual percentages are no higher: in fact, Cunningham has more hotspots around the arc with numerous shots made than Moore does.