What's the difference between social facilitation and social loafing?

Social facilitation is when people do more work while being watched. Social loafing is someone who actually does less when someone is watching.

Social Loafing: When a person does not show much effort to achieve a goal when they work in a group than when they work alone

Social Facilitation: When a person can do better at simple task when in presence if other people.

So the first one us basically saying a person is less working when n a group of other and the second one is saying that this person can work on simple things when people are around. (: Like?