Difference between joint venture and strategic alliance?

Difference between joint venture and strategic alliance?
A unoin of two or more parties who contractually agree to contribute to a specific task for specified time period. Under JV two firms join and form a separate legal entity and operate ar per partnership Act. The JV can be between individuals or corporations.
While Stategic Alliance is mutual Coordination of strategic planning and management in order to achieve long term objectives between two organisations. under this , each organisation will work independently and no separate entity is formed. SA is considered as less risky due to less legalities.