I'm still trying to get my hands on one.
I believe the back you refer to was only available on the F80S, and it incorporates the features of the back found on the F80D, and N80QD (date imprinting on the image area), while adding the exposure info printing between frames. These are two different functions that can be run at the same time or separately.
I was hoping to find the back as a stand-alone item, but apparently it was only offered as a model specific feature, not as an add-on.
F80, N80: AF Control back
F80D, N80QD: Added Quick Date feature to AF Control back
F80S: Added Exposure Info imprint between frames to QD back
F80S, N80s: Added Spot Meter setting, and 25% better AF speed
PF