Obviously, I am talking about post 'acno soul thingy' igneel here. Igneel before that wasn't able to destroy END(in your words.

), so in short Igneel after that is certainly weaker than END, right?? The second version of the Igneel is something that entered into Natsu's body and hence attack that Natsu used in this chapter belongs to second version and not first.
Acno and Zeref comparison is completely irrelevant, since acno is on entirely different level.
END in turn was never able to stop Zeref(Zeref said so himself in this chapter, correct me with wordings again, if you want).
So, nope this version of Igneel is weaker than END and Zeref both.