Comparing pointers with "is"

[monarch_dodra]

When comparing pointers, is there any difference when writing:

int* p1, p2;
if(p1 == p2) {...}
if(p1 is p2) {...}

?

My guess would be that no, there isn't *but*:
*Using "==" shows the *intent* of comparing the pointer values?
*Using "is" shows the *intent* of checking if the pointed objects 
are the same?

Either that, or is it considered "best practice" to use "is" to 
compare pointers, because "==" and "is" have a different meaning 
in the context of using classes?