I don't know if this helps, or how accurate it is, but here's my experience.
The grey-ish ones sound like peach fuzzies to me too, although where I buy from they are referred to as "large pinks" I've also bought a few "fuzzies" there too and they have a lot more fur, and in one instance one "fuzzy" even had one eye open. Not sure if that helps at all, or if the mice are accurately labeled, but Sienna's been eating them just fine anyway - I guess the size is more important than the label.