QR Cards =/ AR Cards
A QR Card is something like a barcode you'd scan on a bag of chips. It's become a very popular way to direct users on the phone to websites without having to type an address. The weird shape of the blob actually contains a pictured version of a URL, for example this is a QR code for Kanzenshuu.com:

This image actually contains data.
An AR Card is something that you'd use to overlay augmented reality tech on. As far as I know, the cards actually act as triggers to open something in the software. Like say, Eye of Judgment. All of those cards are already programmed on the disc, but placing down the card acts a prompt to tell the game to summon that monster. Which means the cards themselves likely don't contain any kind of data. Which is why you can have attractive looking AR cards, where as QR Cards look gross.











