I looked at both and chose the Remington 500. I get the feeling I chose poorly. But it works pretty well for the most part.
Remy 500,,,,
????
Either one is a good choice.
I was wondering about the model # (actually, I was trying to make a joke, but I think I failed), because Mossberg makes a 500, but Remington makes the 870, and those are the two that are always used in the “Ford/Chevy” pump shotgun comparisons.
I prefer the Mossbergs mostly due to how the controls are placed, namely the safety and the slide release. Plus, you can load the Mossbergs without having to constantly push that elevator thingie out of the way, like you do on the Remingtons.