Difference between smoke testing and sanity testing?

      Smoke Testing: It is performed to ensure that the critical functionalities are working fine or not. This testing is performed by Developers or testers. It is the first testing on the initial build. It is done on every build.

Sanity Testing: It is done to check that the new functionality/bugs have been fixed. It is performed by the testers. It is done when the build is relatively stable. It is done on stable builds post regression.