Are they really competing and will either be broadly used?
QR Codes Hope to Be This Summer’s Breakaway Hit- Tech News and Analysis «
“They’re [ShareSquare, PaperLink and others] hoping QR will be the first to grab a place in the sun, and in consumer’s minds, ahead of NFC.”
NFC will arrive broadly next year, yet QR Codes don’t require the same proximity as NFC does (actually QR Codes could be quite distant, provided they are large), so I believe applications will be different: NFC will primarily be used for identification of the phone/person. QR codes will primarily be used to access information.