[phyrex]

The difference is that the information gets processed, stored, and accessed only on your own devices with Apple, and on metas servers in the case of Facebook.

[warkdarrior]

How does information about my face gets processed, stored, and accessed only on your own devices? Without Apple's help?

[phyrex]

I don’t understand the question? iPhoto detects faces and you can assign one of your contacts to that face?