Difference between factitious disorder and malingering?

Factitious is the intentional production of physical or psychological symptoms in order to be diagnosed as ill (making up some symptoms that are not existed, with the aim of being diagnosed as ill).

Malingering has more to do with exaggeration of symptoms, meaning that the symptoms are there but not as the patient is describing them.

Both have a common feature in which the intention is to gain a reward, avoid duties or financial compensation.

Factitious does not bring any external reward but Malingering does.