DD(X) -- next generation destroyer, US Navy, 2007 - ?

Displacement: 14,000 + tons

Armamant: Two 5" extended range guided munitions rifles; 128 vertically-launched missiles

Tactical advantage: stealth configuration, novel electric drive

Cost: (estimated as of 2007-2011: $ 6,600,000,000 per ship

Outlook: Uncertain

CSS Virginia, 1862 - 1862

Displacement: 3,200 tons

Armament: two 7 in (178 mm) rifles, two 6 in (152 mm) rifles, six 9 in (229 mm) Dahlgren smoothbores, two 12-pounder (5 kg) howitzers

Tactical advantage: stealth configuration, armor plate

Cost: $ 186,000

Outlook: Scuttled by crew after battling USS Monitor to a draw, 1862

More than coincidence? You decide.