Difference between Smoke and Sanity testing

Smoke	Sanity
Smoke test is performed to check if the major functionalities as proposed  in the requirement document is working as expected or not before starting system or regression testing.	Sanity test is performed after system or regression testing is carried out to ensure that major functionalities are working as expected and not broken.
Smoke test is build verification testing	Sanity test is build acceptance testing
Smoke test is carried out to check all the major functionalities of a product. If smoke test fails then the build is declared as unstable and testing is stopped.	Sanity test is carried out to check on  a limited functionalities of a product.