I've shot both. Nice guns. I'd say they're pretty comparable. One of the guns had a long length of pull which I didn't care for but I can't remember which gun it was. Have you checked out the Benellis--my first choice.
Tastes Great/ Less Filling. Today's Gas Operated scatter guns are a lot better than days of old. I would add the Remington Versa Max to your list. If you are not set on gas look at Benelli. There is a reason Benelli has been the standard in Arkansas duck pits for decades.
I also think 3.5" is over rated vs 3" but could be useful for occasional Goose hunts.
I shoot benelli. A buddy of mine bought a berreta, shot it and then bought the maxis . He shoots the maxis. Post this on the duck hunting chat or on nodak outdoors. You will get a lot more feed back there. I have been looking at that new remington, a guy can never have too many shotguns.
ok, scratch the maxus. i just bought the new vinci. ive never held a better feeling shotgun. my wife was on the couch this morning when i got up. i asked her what the deal was? she responded, " ill be damned if im sharing my bed with a damn shotgun" guess ill have to put it in the safe.