Poita, I think you would be best served if you told them you picked AJV on your app because you had to pick one. I would tell them that I my preference is the one that would get me into class the soonest. In the answer you gave, you make a lot of assumptions.
You said that you love the lifestyle and freedom of flying freight. That one statement alone would bring on more questions. What do you mean by freedom? You would have to explain exactly why you think cargo has more freedom. Freedom to do what? What if they merged the operations and you flew pax and cargo? Would you not be happy? Those are the types of follow up questions that you would be inviting.
Also, there is no extra day off at AJV from what I have heard. The days off are the same in both contracts now.
The statement about night flying is one that I wouldn't make unless asked. You will be flying at night no matter which way you go. AJX isn't all day ops. They do a lot of night flying.
Lastly, the route structure can change so I wouldn't put any emphasis on that either.
That's just my opinion and it may not be the best so take it for what it is. Think about it and good luck on your interview.