I have the same feeling but I cannot find arguments: they make money by selling very similar materials.

I think Google only better markets its intrusions than Facebook... Something to do with the public sentence "don't be evil". Indeed "evil" is like "common sense": everybody has its own and understands what comforts him/herself. Seems like pure marketing.

Maybe someone has any argument about the reality of this different Google/Facebook privacy intrusion/protection feeling?