My son has a 12ga. Gold Hunter. I have a Super X2 12ga. and a 20ga. Gold Hunter Classic. They are basically the same gun. I would choose the one that fits best. The Super X2 has a higher rib than the Browning. The Browning has the magazine cut-off option that the Winchester does not have. The gas mechanism is very slightly different.
I believe the Browning may be slightly more refined than the Winchester.
These are superb shotguns and you would be well served by whichever one you chose. I am not sure what your plans are for the gun. Ours are all 3" chambered guns.
All said, if I had to do it over again for similar costs, I would opt for the Winchester Super X2 Sporting Clays model.
Regards,
Rich