What is the difference between exclusive friends with benefits & dating?

Friends with benefits:

It defines for one purpose, sexual posses, they're not dating. It's a friendship that reached the agreement of intercourse and related activities, therefore, they know each other.

Dating: 

It's a date! The first purpose of a date is to go further and know more about the opposite, the goal is to build a relation, a commitment, and it does not necessarily involve with physical attachments.

-And if the two side not know each other very well, (then they are not really consider as friends) and they have no aim of commitment and still desire physical attachment, that would be called, one night stand.