The US Marine is a trained specialized force for general duties, and on the other hand, the Royal Marine is a well-trained force for special and more enhanced duties; that is to say, they can be referred to as commandos.
Are British marines better than Royal Marines?
The Royal Marines are specialist troops, specialising in amphibious assault. They train for longer and to a higher standard than the average British soldier (although many would dispute this) and are actually part of, and are funded by the Royal Navy. They also specialise in cold weather and mountain warfare.
Do Royal Marines work with US Marines?
Royal Marines from Charlie Company of Taunton-based 40 Commando fighting alongside the United States Marine Corps (USMC) at huge urban operations training complex in Muscatatuck, Indiana.