java.lang.AssertionError: expected

My TestNG test implementation throws an error despite the expected value matches with the actual value.

Here is the TestNG code:

@Test(dataProvider = "valid")
public void setUserValidTest(int userId, String firstName, String lastName){
    User newUser = new User();
    newUser.setLastName(lastName);
    newUser.setUserId(userId);
    newUser.setFirstName(firstName);
    userDAO.setUser(newUser);
    Assert.assertEquals(userDAO.getUser().get(0), newUser);
}

The error is:

java.lang.AssertionError: expected [UserId=10, FirstName=Sam, LastName=Baxt] but found [UserId=10,   FirstName=Sam, LastName=Baxt]

What have I done wrong here?