¿What is the difference between cortijo and finca?

Cortijo

Cortijo is a type of traditional rural habitat, surrounded by cultivated lands in the Southern half of Spain. The families who used to live in a cortijo, they were known as "cortijeros".
Many cortijos became deserted by the abandonment of local youth.

http://www.spain.info/es/reportajes/cortijos_de_andalucia_el_encanto_de_lo_rural.html

Finca: property in the countryside or in the city

Rustic Finca: it is normally a large area of rural land, it is limited to urbanize in terms of its extension and location.

Urban Finca: it is a surface with or without a building within the city or on land for urbanization.

http://www.spain.info/es/reportajes/los_jardines_de_la_malaga_verde.html