‘We are God’ and ‘we all have God within us’ are two completely different notions. Suppose we are God and we haven’t realised it yet; this means God has some kind of ignorance of His/Her own existence. Omniscient God cannot have ignorance of any kind. And this is one of the biggest fallacies of Advait Vedanata.
The sentence ‘we just haven’t realised it yet’ makes sense only when we believe ‘we all have God within us’.