Grouping In Facebook aka Smart Lists

• Facebook's Description - Best friends who you want to see more of on Facebook
• Google Plus Reference : None
• Adding - You have to manually add people to it
• Use - Sharing personal information, pictures, or any other things that you trust only your best friends can keep (can also be used to stalk follow people closely, as facebook notifies you everytime they post something new)
• Anonymity - Friends do not know if you have added them to this list or not
• Other - Gives you a notification every time someone posts something. Can be changed.

Acquaintances

• Facebook's Description - Friends you want to see less on your news feed
• Google Plus reference -  has a circle of that name
• Adding - Manually
• Use - Priority in your News feed. You get less clutter from a friend if you put him in this list
• Anonymity - Friends do not know if you have added them or not.

Family (Denoted by home Icon)

• Facebook's Description - Your Close or Extended Family
• Google Plus reference - Has circle of that name
• Adding - Automatic, if you already have family added in FB. Can also be done manually.
• Use - Priority in your Feed. Posts from Family are shown more
• Anonymity - Person has to accept a request if you want to add him to your family

It is usefull yet it is already a feature on Myspace & Google+ and facebook have also now launched the new timeline feature also taken from Myspace ... It is not fun anynore .
That's what I think and you ?