Fit wise they will be fairly close so as long a the mid/narrow last and volume is working for you then really your choice is 3 piece vs Overlap.
3 piece will give a more consistent forward flex. It will feel forgiving and smooth but will lack power to ski hard out of the park.
The he ghost will feel more like a standard boot. The forward flex still feels good but not quite as nice in the park (my personal opinion) but will ski much better out of the park.
They are both pretty soft boots so ensure they will offer the surport you need, both can be stiffened though.