You don't seem to understand.not entirely, since only one form of instant peel apart is made
Fuji 3.25 X 4.25, pack-film, works equally well in either the Polaroid or Fuji backs.
The same goes for using the current 3.25 X 4.25 [Fuji pack] in Polaroid 100-200-300-400 series
'Land Cameras,' and in all of the Polaroid, 'pack-film' backs used with MF cameras...to this day.
Especially more so, since 2008 - Polaroid's last bankruptcy.