I think it's less about the data, but more about the consent regarding the usage of that data. At least the call message is honest about its intent, so you know

I think it's less about the data, but more about the consent regarding the usage of that data. At least the call message is honest about its intent, so you know what you're consenting to. The Facebook button, however, doesn't state that it's there to track your interests to advertise to you more effectively.