A:AnswerThe difference between the two cartridges that you listed in your question is the amount of ink that they cartridges hold. The HP 564XL Original Ink Cartridges are high yield cartridges and contain more ink. They are considered as a cost effective purchase because the cost per page is lower then the standard HP 564 Original Ink Cartridges.
A:AnswerNo, the HP Photosmart Plus All-in-One Printer (B209a) does not use the HP 564 Photo ink cartridge. This ink cartridge is only used by printers in the HP Photosmart Premium All-In-One Printer series. I apologize for the confusion.