QR codes are easily copied in a photocopier or even just captured with a smartphone camera
Ink for QR codes often fades when left in sunlight
QR codes protected behind glass are often unreadable due to dirt, water or reflection
RFID tags are difficult to copy as they have a factory built in ID
RFID tags do not degrade over time
RFID tags have many form factors and can be made very rugged
RFID tags can be installed using glue, screws or other fastening devices