Nelson is probably wearing dress shoes while Colorado is wearing heels. Colorado was almost a hundred feet shorter than Nelson, she is pretty small by WW2 era battleship standards, closer to WW1Superdreadnaught or Dreadnaught sizes... or if your me in Rule the Waves she is my pocket battleship I build to pad my navy and expand the areas I can defend while my superbattleships rain hell on all my enemies!
