Sorry for the long delay, back surgery had sidelined me for a couple months. I was finally able to compare my truck ('15 F-250 w/ 10k GVRW option) to my neighbors ('15 F-350). Both are the exact same, Lariat/diesel/CC/SRW/4wd/short bed/20" tires. If I remember correctly, the 350 has one extra leaf spring in the rear.
Here are the weights right off the door stickers :
F250:
GVRW-10000
FRONT GAWR-5200 (@65 tire psi)
REAR GAWR-6100 (@65 tire psi)
F350:
GVRW-11500
FRONT GAWR-5600 (@65 tire psi)
REAR GAWR-7000 (@80 tire psi)