Winchester Supreme vs. Beretta Onyx

Recently I posted here inquiring about which O/U shoutgun to buy in the $1000 price range. I received many good posts and have checked all from Remington, Browning, Winchester, Ruger, Beretta and several that I can't recall. Anyway, everyone said to check for fit and this is what I have done. The two that seem to fit me the best were the Winchester Supreme and the Beretta Onyx. I can buy either for around $1200. My question is, I know the quality of the Onyx, but haven't heard anything about the Winchester Supreme. It says on the barrel that it is made by FN in Belgium, but that is all I know. Has anyone had any experience with these guns? It has a little different lockup than most I have seen. There are two pins that protrude from the receiver and extend into the barrels when closed. Is this a good system? Anyway, any help would be appreciated.