On the other hand, people probably have slightly different versions of glial cells, and which model of glial cells you have might have some effect on your personality and intelligence.
Actually, it's probably not just one model per person. I've been told that there's more than one sort of ATP (copying errors and variations), even inside one person, and if ATP isn't universally identical, then you can't expect anything else to be.
I know next to nothing of biology, but I would naïvely expect the structure of the ATP, ADP, AMP, etc. to be fixed across all organisms with mitochondria. Shouldn't copying errors or variations that produce something other than ATP in place of ATP kill any eukaryote, let alone a human? Perhaps you mean variations to ATP synthase?
http://www.scientificamerican.com/article.cfm?id=marijuana-reveals-memory-mechanism
I wonder what the implications are for brain preservation and whole brain emulation? If glial cells are important, then saving and emulating the neurons alone probably won't be enough.