Intended client: rapid rehousing tends to serve clients with less intense service needs, while PSH serves clients with more intense and/or ongoing service needs
Supportive services: in RRH, supportive services are focused on housing and financial hardships. If the household wants more support, the case manager connects them with community based resources. In PSH, supportive services do address housing stability, but also address other needs the tenant may have. Additionally, more services are provided by the PSH provider/care team.
Time span: RRH is very explicitly short term, usually lasting less than 6 months. Permanent housing, though not always permanent, lasts longer than that.