sanity testing means .if any extra funcation add in 
particular project will check that.it is called sanity 
testing.It was tested by test engineers.
Smoke testing means the developers test the build before 
realise to the testers.

Removing extra functionality is not sanity testing its
sanitary testing or garbage testing.Sanity testing is some
how similar to smoke testing .In smoke testing they ensure
the flow of the project is perfectly matching with the
customer requirement.And they concentrate on the below factors 
Whether the Application under test is
understandable
operatable
observable
consistant
controllable
simple
maintainable
Automable(optional)
Thats y its also called octangle test.
Smoke test is done first.

i think both are wrong..

Sanity means : After reciving build/ Software check whether 
it is ready for major testing 
Ex: when we have many tesctcases will check two or three 
tcs on sampling basis

Smoke testing is similar to sanity, but when it released to 
production, what you u do is called smoke

i think testing the exta functionalities of the s/w is not 
sanity it is sanitory testing
   smoke testing or sanity testing is to test the build 
where it is testable or not withrespect to below factors to 
get a stable build
simplicity 
Understandability,Observability, Operatable, Automatability
Maintainability ,controlable, consistancy.
 hi this is satya ,any doubts contact:9912418320

i think sanity testing means verifying that the build is 
ready for testing/not and here we will specify reasons that 
why its not ready for testing where as in smoke testing its 
an just overview that the build is ready for testing/not we 
don't specify reasons.

Sanity Testing: testing the extra functionalities of the 
application with respect to customer requirements. It is 
also know as Garbage testing or deep testing.
where as 
Smoke Testing: testing the overall functionality of the 
application without any runtime error. This testing is done 
at the initial stage. It is also known as Shallow testing.

Smoke test is performed first.

Sanity Testing means the testing which to pass for the next
level of Testing.
For example:
              If we are not able to pass the login then we
are not able to test the rest of the Functionality of the
feature in that module.
** The test case fail in sanity testing is on high Priority
and High severity.

Smoke testing means on fly when any module is look upon
every where as to test all functionality.
For Example:
            As before examination we revise A to Z of the Book.

Better we can say both Sanity and Smoke testing are same.
When tester get a build, he will test the main functionality
of the application to check whther the application is
consitant or not is called Sannity or smoke testing.