Your experience is not typical and it doesn't change the fact that they're the same company and my experience is exactly the opposite of yours.
Funny, I don't see many guys at my club or buddies in the field trading their Beretta's for Benelli's.
There isn't a lot of difference between the intertia operated Benelli's and the gas operated Beretta's. In fact, Beretta has done a lot of technology changes in each of their lines, borrowing from Beretta, Benelli and Franchi to improve every line.
Edit: Oh and the OP asked for help with Beretta, not Benelli, so your comments are not only incorrect, they're off topic.