Not sure if this goes here but could not find a catagory, I am trying to figure out why seats 20 to 27 are considered "preferred" on a Boeing 777 vrs the economy seats behind these... I am tempted to change my seat but seat guru says there is no difference. Just wondering if its an airline ploy to get more money or is there really a difference in the seats.. not sure how to find out.. any advice?? We are flying to London from NY so sort of a long flight and want to be as comfortable as possible but reallly cannot afford business (I wish)