Two sons and two guns. One has an 870 and the other a BPS and its the max4 camo version. The BPS has a bank vault strong action and is clearly a more solid feeling gun. It had an issue feeding occasionally and we discovered the shell latch which rests against the mag tube was the culprit. Its a stamped part that had a slight burr that sometimes hung it up enough so that shells couldn't come out of the tube. Its fixed now and is dependable.
The 870 action is way looser and would probably work if you threw a handful of sand in it. Its shot a lot of ducks and geese without ever missing a beat and the number one son never lets number 2 forget it. Personal preference IMO .....can't go wrong with either.