My personal Facebook page provides more information regarding my personal and professional life but is less "serious." Friends, family and colleagues can scroll through pictures, posts and status updates in addition to viewing who I'm connected with on a personal level.
While I can network with a future employer or coworker on either site, I would select LinkedIn first as it's more professional. If I recently met a new friend and wanted to connect on social media, I would choose my personal Facebook.
However, it's now common for businesses to create a presence on Facebook as well. Many users will follow their pages to receive status updates and share posts. These business can be large corporations or small business operations. To create a more professional presence, I have a Facebook account that is more soccer specific. My current and past teams can befriend me to stay in contact. I use this site to post soccer and coaching related material only.