They're maybe an inch lower. The floor is cut to hold the bladder pretty tightly, so they don't really sag much.
The standard floor pocket holds water and helps pull you over some waves, and gets blown around by wind less.
The sealed floor pocket surfs a lot better. :laughing:
My buddy took my 156R down both the upper and lower Lochsa this weekend at 9kcfs with a bunch of small adults, only one of them had ever been on the river before. He likes a wet ride and hits every small and medium-sized hole. They ran it clean.