First, the unit's leader can be assembled with or without his helmet. Within the Phase II Clone Troopers Unit Expansion, you'll find everything you need to deploy an elite corps unit of Phase II Clone Troopers, including seven Phase II Clone Trooper miniatures featuring a variety of customization options.
Additionally, the clones wearing this armor were themselves better trained and more experienced than those first deployed at the start of the war. Phase II clone trooper armor reflected one of the Republic's greatest technological successes and included advanced tactical gear that further augmented the clone troopers' individual strengths.