Aiiyyooohhh....this question again? :P
Nowadays, can't really say which is better because you can modify both engines to crazy levels of power.
Even if both engines are standard. The 4E engine has more displacement, but lets say its condition is not so good, then will it perform optimally? Or vice versa. So there are so many factors to consider.
If in terms of engine transplant, I think the 4E is easier to find than the GTti.