Most pilots here would(I think) say " Do the license where you intend to live and fly". Whether private or commercial that makes good sense.
Private.... You will be learning the rules and regs, area, airspace etc of the area you intend to fly in and you will have the school to fall back on when questions crop up down the line. And they will.
Commercial.. Same as above but also thge people you meet and the contacts you make whilst doing your training will most likely stay with you for the rest of your career. Keep that in mind when deciding wich school to choose and how you are going to conduct yourself whilst learning.