I can't imagine the dinette in the Lance is larger than the AF. My dinette in my AF990 was 76" long I believe. Adults could easily sleep on it. Can someone confirm this?
Anyway, with kids, using the dinette as a bed, the dimensions for me would be critical.
Also, placing the fridge in the slide opens the AF up and gives you another place to sit or set things on the landing below the fridge. I found I would sit there often.
Also, I think AF is made better. Given they are usually cheaper, it is a no brainer. But if weight is a concern, the Lance is probably lighter.
Gman