The G4 Glocks have the adjustable grips. Ive never held one, but it might be the answer. Personally, I detest an external safety on a handgun (SA semis being the obvious exception). Thus to me a Glock is the way to go (a lefty just uses the triger finger on the mag release rather than the thumb). Still, its whatever fits her (doubtless dainty) little paw the best. If neither works, sell them both and buy one that does. There are too many good pistols out there not to have one that works.
FQ13