What key behavior differentiates binge eating disorder from bulimia nervosa?

Binge eating disorder is always associated with severe underweight and amenorrhea while bulimia nervosa always results in obesity and metabolic disease.

Binge eating disorder is defined by purging after binges with laxatives only, whereas bulimia nervosa is defined by restriction followed by occasional overeating that is not enough to be a binge.

Binge eating disorder involves recurrent binge episodes without compensatory purging behaviors, whereas bulimia nervosa includes binge episodes followed by compensatory purging behaviors.

Binge eating disorder only occurs in males and is associated with increased athletic performance, whereas bulimia nervosa occurs exclusively in females with aesthetic-sport backgrounds.