Even a Duchess wears the same outfit twice.

Kate Middleton's fashion choices have ranged from her one-of-a-kind gorgeous Alexander McQueen wedding dress to the same jeans for three days, but she has one habit that has earned her the respect of women around the world -- she often recycles her favorite outfits.

Although Prince William has said fiance Kate Middleton, or anyone else for that matter, is not trying to fill his mother Princess Diana's shoes, royal experts are drawing even more distinctions between the two most important women in the young royal's life. RadarOnline.com spoke to one royal expert whose comparisons show how Kate may surpass even the highest expectations of a princess set forth after Diana.

PHOTOS: Prince William & Kate Middleton Pose In London

"Kate and Diana are very different. They come from totally different backgrounds," Claudia Joseph, author of Kate: Kate Middleton: Princess in Waiting, told RadarOnline.com. "Diana hailed from an enormously privileged, aristocratic, old English family. Kate comes from a family that - as you can see from my book - descends from working class mining stock. In many ways, she had a much more modern upbringing."