Remington vs. Mossberg. Remington would win in my court every time. I've operated both and have never been impressed with any Mossberg. Their pumps are big, bulky, and loose fitting.
I was in the market for a new semi-auto. Scheels offered a shotgun demo day. Shot the Benelli SBE 3, Browning, and Beretta A400. Bought the Benelli.
My suggestion is to handle and shoot both. Choose which you like.