I'm not sure if one is better then the other, and I'm not sure if I can justified the differance in price. When I was in the market for a semi-auto years ago (deer hunting only) I couldn't afford the Benelli, so I went to the 11-87, the only issue I had with it was the rubber O ring, I replaced it and it has served me well. Shot placement is key. I'm in the hunt for a 20ga 1100 with a slug barrel.
The choice is yours and only yours, shoulder both at the same time and see which one fits you better