not to downplay your points, but we are not going to shoot a shotgun enough to wear it out, and for those of us who arent going to build a tactical shotgun and dont care how many accessories there are, we who shoot on weekends and hunt occasionally, it wont matter. honestly both guns are well built.
i prefer the winchester, even after owning a remington for almost 10 years. the WINGMASTER remington is better than the 1300, but only because of finish.
the 1300 uses much nicer wood and the metal is a glossy smooth finish, unlike the asphalt finish of the matte 870 express, which actively seeks out rust, lol.
like i said, i prefer the 1300, but go pick em both up and see what fits and what you like.
-Matt