The 520 has cantilever brakes and the Le Tour shown doesn't.. I just saw a Le Tour Luxe the other day with cantis as well, though it might be relatively rare. Perhaps the Le Tour Luxe with cantis might be more comparable to the 520?
Maybe-probably, but I don't have a Le Tour Luxe, I have these two. And they're even the same color, nearly the same size, and both made in the US.