tomPietrowskiFit 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.
Hit the nail right on the head.
Also, you are going from a wide boot to a more narrow boot. So if your SPK's fit you well, your feet won't fit too well in your 2 choices. I recommend seeing a boot fitter to properly examine your boot and give you the best fitting boot.
"And to all the tittymunchers out there. Its a Large. I don't fuck around with X's like a horny eighth grader." -Skoalsteeze
buck has a park?