I do not have an honest opinion since I only have one Fox and it is not a Sterlingworth compared to quite a few Ithaca shotguns and at least one in each gauge produced by Ithaca. I'm not as worried about my guns weight to the ounce as some of you seam to be, so I love my Ithaca shotguns and most of my shooting is done with NID's. The NID measurements work for me. If we can give any merit to how many were produced by each maker, which gives us a true reading of the shooters of that era, Ithaca wins over every other American double gun maker. This is the reason, in my opinion, why Ithaca's are not as high priced. I've considered buying different AH Fox shotguns and hope to buy a few more some day, but there prices just push me back to my dependable Ithaca shotguns.
Only my opinion,
Stan