Browning / Winchester are the same company now ( have been for several years ) ....and both are owned by FN. But it looks to me, like the Browning people are running the shotgun division....
There are very few, if any, other than cosmetic differences, in my opinion - between the Browning & Winchester's offerings...but the prices vary a little. You'll have to find a store that carries both and compare them side by side.
In general, Benelli's inertia guns will cost you more than most of the comparable gas gun models from Browning / Winchester or Beretta. Benelli is owned by Beretta / but Beretta has maintained their gas gun line - and Benelli has stayed in the Inertia guns...
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Shoot what you like the best .... personally, I favor the Benelli - in a clays gun, I like their Super Sport offerings in both 12ga and 20ga...and I've had one of each for a little over 10 yrs now....both still very solid guns / Browning Silver series is attractive based on price - and a good gun for the money in my view / Browning Maxus is a solid gun ....Beretta has a lot of offerings and they're nice guns as well.
I don't know which model is the cheapest ...from all 4 companies ...it comes down to what gun "Fits" you the best, what your budget is ....you can't pick a bad gun from Browning, Winchester, Beretta or Benelli in my view...and they have shotguns from $ 700 - to well over $ 2,000...( but I can't recommend some of the other Beretta companies like Stoeger or Franchi - because I don't they are up to the standards of the guns made under the Beretta or Benelli name - based on what I see at our local ranges).