In my opinion the BPS is a better gun, but like you see more expensive. I would check to make sure that is a good used price though. I don't know what brownings go for used. If I had the money I would get a BPS over a wingmaster, but it is really just preferance, both are great guns. The browning will be nicer than a 870 express in fit an finnish most likely.

They are also a bottom eject.

And I'm not sure about the older ones, but the newer rifled barrels have a faster twist rate than the remington slug barrels do, so they may shoot the faster slugs better.

Paul