I also have thin feet, and absolutely love the walnut BB Fifth Aves. They are my favorite in the rotation right now. They fit a bit tighter than the reg AE one, but much more comfortable, almost feel bouncing as I walk. I also like the rubber sole, they hold up better in this wet weather.
Don't want to speculate anything but i feel like the leather was much superior than the AE model. My Fifth Aves don't crease as much as the Strands or Park Aves that I have, I wonder if they have better lining.
Here is a shot of them with about 20 wears.
Looking good brother