The two ship designs were equivalent in many areas, including length, speed and weapons outfit, although the Arleigh Burke class was larger with a displacement 2,200 tons greater than the Spanish frigate, and had superior capabilities in regards to range ( 700 nautical miles greater), helicopter operations (two embarked helicopters instead of one), primary armament (a 64-cell Mark 41 Vertical Launch System compared to a 48-cell launcher), and close-defence (with a second close-in weapons system).