I know you don't give a damn about the orb crystal because it's not mandatory to get an S for the orb pickups, but with Trish, if you tried to perform a round trip using the Sparda and aim it on the orb crystal, it looks really cool and you'll get more orbs than usual. Typically it takes two round trips to take down the orb crystal.
Special Edition allows you to play as Lady, Trish and Vergil in addition to Dante and Nero. Trish handles Dante's parts of the main campaign if you choose her and Lady.