A pound is a pound, be it fat, muscle, feathers, dog food, uncooked rice, horse oats, goose down, hay, kitty kibble, lettuce, quilt stuffing, what ever.
Muscle does not weigh more than fat, it's just more dense and takes up less space!
A pound of goose feathers weighs a pound, a pound of ball bearings weighs a pound, which takes up less space?
The concept that muscle weighs more than fat annoys me to no end!