I found this information at :
http://www.americanheadachesociety.org/assets/Grosberg.pdf
ABSTRACT:
The trigeminal autonomic cephalalgias (TACs) include cluster headache, the paroxysmal hemicranias and short-lasting neuralgiform headache with conjunctival injection and tearing (SUNCT). Each of these disorders occurs in an episodic and chronic form. All of them have in common the occurrence of unilateral pain in the distribution of the first division of the trigeminal nerve and ipsilateral autonomic features.
short-lasting neuralgiform headache with conjunctival injection and tearing (SUNCT) syndrome.
The differences between cluster headache and the other trigeminal autonomic cephalalgias are the duration and frequency of daily attacks and their responses to particular treatments. Cluster headache typically lasts from 15 to 180 minutes and occurs one to eight times daily; the paroxysmal hemicranias are brief (2 to 45 minutes), but occur more frequently (one to 40 attacks daily). Cluster headache
occurs more frequently in men, while episodic paroxysmal hemicrania usually affects women.
The other main factor concerned with differences between the two are the pain levels, the paroxysmal hemicranias are considered moderate to severe pain where as cluster headache's are considered severe to excrutiating / intolerable.
Regards Shell