Zero difference.

Thank you for posting @dantheman.

Edit. If @ausbitbank is wrong....then are we are speaking of value?.....no, because you specifically wrote...how much more does a pound of feathers weigh than a pound of gold......bleujay is stumped......obviously missing something that probably clear to a few....but a conundrum to the many.......How about an English pound's worth of gold?.......still thinking on it.

edited to correct quote

Great puzzle/riddle. Cheers.