QR Code vs NFC

Hi Guys,

Just seeking some advice from others who may have a better thought towards this but am thinking of either getting a QR Code to stick to the back of my phone or an NFC tag to put in my phone case or similar when I am out and about meeting people.

Essentially, I am looking at building up reviews and audience mainly. Would I be best doing this sending to Facebook or onto Google? I own Financial Planning, Accounting, Bookkeeping firm and we have a rather large client base.