The supersport in 12 or 20ga is a very good gun / and yes it offers you a few things that some of the lesser expensive models in the Benelli line-up don't.
It is not my primary gun - but I have Super Sports in 12 and 20ga. I use them for training guns for new shooters, my grandkids, etc / and I use them as a foul weather gun on the Skeet, Sporting Clays ranges - and I use it as my Travel gun - where I only want to travel with one gun to do some Skeet shooting, Sporting Clays, a little bird hunting, etc - and its ok for casual Trap shooting.
Super Sport is a light gun / so in 12ga I like a 30" barrel - to give me a longer sight plane and smooth out the swing. 20ga only comes in a 28" / so that is what I have on that gun. They shoot very cleanly, the comfort tech system makes them a soft shooting gun ( that's the only way the Super Sport comes), they are easy to strip and clean. I shot mine in the rain yesterday for Skeet - took 10 min to strip it, including trigger group out, clean and put it back together when I got home.
Super Sport comes with 5 chokes - which is all you'll need.
The super sport is modular - in that it is easy to change the butt pad / comb pad - but you have to buy them separately. I keep left and right handed pads for mine / 2 comb pads - because I use them for training.
The Super Sport is my semi-auto of choice despite the price / and I see them retailing in my area for $ 1799 for 12ga / and maybe $ 100 or $ 200 so less for the 20ga.
My 12ga SuperSport will cycle loads down to 7/8 oz ( a typical 20ga load ) as long as its 1200 fps - so you can make the 12ga version perform like a 20ga - if that matters to you. If you want to waterfowl with the Super Sport - some black elec tape - will camo the gun up just fine ( receiver is too bright in a duck blind ).