Facebook vs Google

[Yunisbel Marrero]

Hello everybody,

I was reading the other day that some of you are using facebook for ad, so I give it a try. now the problem is, when I look on facebook stat, is show that my add is being click 16 times, but I notice on google analystic, that only 8 was from facebook, half of what facebook said.

Do any of you guys have the same problem or may notice a different between google and facebook, or any other stat site you are using?