✰ Sanity testing is performed when new build is released after fixing bugs where as smoke testing is performed to check the major functionalities of the application.

✰ Sanity is performed by the tester or the developer but smoke testing can be performed by the tester or developer.

✰ Smoke testing is performed earlier where as sanity is performed after the smoke testing.

✰ Sanity testing is narrow and deep approach of testing and smoke testing is focused testing based on major functionalities.