Hope this helps
Taken from the DSM's description of BED- taken from something-fishy.org
An episode of binge eating is characterized by both of the following:
- Eating, in a discrete period of time (eg, within any 2-hour period), an amount of food that is definitely larger than most people would eat in a similar period of time under similar circumstances;
- A sense of lack of control over eating during the episode (eg, a feeling that one cannot stop eating or control what or how much one is eating).
- The binge eating episodes are associated with at least three of the following:
- Eating much more rapidly than normal
- Eating until feeling uncomfortably full
- Eating large amounts of food when not feeling physically hungry
- Eating alone because of being embarrassed by how much one is eating
- Feeling disgusted with oneself, depressed, or feeling very guilty after overeating
EDIT: Basically the difference is the compulsive way in which it is performed