User blog comment:KirbiMiroir/Clones 4 CA$H/@comment-16216315-20160224222907/@comment-12498802-20160228082349

Okay. From what I can tell, the main difference is Dark Pit's Silver Bow is harder to control than Pit's Palutena Bow but deals more damage. Also, his Side Special has an electric quality. Finally, their Final Smashes are completely different, with Pit bombarding literally the entire screen with the Three Sacred Treasures and Dark Pit shooting a purple laser from his namesake staff.