I think the chopped up brain would be as much you as you after a concussion assuming no bulk damage within slices. The neurons along the cut lines are destroyed, but it is still small percentile of all the neurons, and it's not localized to one critical region. The neurons express distinct versions of a protein for self avoidance http://biologie.univ-mrs.fr/upload/p243/Dscam.pdf , so it is plausible that you can make sense of which wire goes where after scanning. Whereas the brain where all the strengths were screwed up by cryoprotectants, may likely be completely insane or entirely lack anything that you'd care to preserve.

This is assuming there's no gotcha like the memory storage being dependent on a dynamic process.