After making a profile in LinkedIn I could tell there's a big difference between LinkedIn and Facebook. Facebook is geared more for social recreation as opposed to LinkedIn which is more for your professional career. LinkedIn is only interested in getting your work experience, education, professional acquaintances and special skills/interests. On the other hand Facebook asks you some of the same things (place of employment, education, etc.) but it's also interested in who your friends are, what you're thinking, what recreational things you have done lately and collecting your pictures of your activities. When going out in the real world LinkedIn would be a better representation of yourself when getting employed rather than Facebook. It just represents you in a more professional manner.