767s often give a better sense of room in general because of its great seating configuration. I know the seating configuration has more to do with width, but it just seems to have an overall effect, nonetheless, AC's pitch is probly a standard 32" while QF I would think to be somewhere in the 29-30" range. Hey, you got to pay for that long haul some how!
P.S. These are not exact numbers but simply my estimates.
Sometimes I go about in pity for myself and all the while a great wind carries me across the sky.