Wingmasters are akin to Gods gift to Mankind when it comes to pump shotguns.
This is absolutely true (I asked Him myself). Too bad He, and those who are prone to wet dreams, are so easily satisfied.
The Devil (demanding SOB that he is) prefers the first commercially viable pump, and still the best, the Winchester 1897. Look up "rugged" in the dictionary and you'll find a picture of a '97.
No slag on the 870 Wingmaster - it's about the best you could hope for when you're trying to copy the success of an indomitable design such as John Browning's 1897. You'll hear all kinds of emotional arguments about which is best but, the '97 was and still is the state of the art.
The reasons the Wingmaster is better than the Express are many. But, they all have the same cause - manufacturers were leaving no stone unturned in a headlong rush to cut costs. The 1897, the model 12, and the original Wingmaster were all demonstrably superior to anything made since 1970. Unfortunately, the market (us consumers) got stung by the price point bug. Somehow we were all dazzled by cheap, low quality consumer goods.
I, for one, am bucking this trend. Walmart running shoes last me about 3 weeks before they start falling apart. Cheap winter coats look like rags after one season. Cars, computers, everything is designed with "components" that are 'whole unit exchanged' rendering actual 'repair' a thing of the past and making it cheaper in many cases to throw an item away and replace it, than to fix it and continue enjoying it.
Quality as a concept has been so bastardized that it's come to be a measure of the chance of a product surviving to the end of the warranty rather than any measure of actual material longevity or workmanship.
I'm extremely critical of "advancements" in materials (although real progress does occur, most synthetics are merely cheaper, not better). I seldom buy new firearms and, when I do, I find that I get less for my money. All of my favorites are vintage guns.
Admittedly, this attitude is not for everyone. I don't hunt migratory, so the whole non-tox issue is irrelevant to me. I don't have a bias for or against choke tubes. Double guns with double triggers serve all my needs, provided they're choked F/M or appropriately for a specialized game (such as skeet or snipe hunting.).
Recommended reading on this subject: Zen and the Art of Motorcycle Maintenance by Robert M. Pirsig.
If you think this is merely a matter of personal preference, ask yourself why the States are in so much trouble. (Yes, profligate spending is a root cause. But, if they had received value for all that spending, rather than blowing it all on cheap Chinese junk, they'd have something to show for it. Exporting jobs to take advantage of cheap labor is a huge drain on the economy. Paying a premium to get highest available quality gets you really good stuff that lasts longer and actually costs LESS when the whole product lifecycle is taken into consideration.)
If you're after an 870, get a Wingmaster. It'll cost twice as much and work 4 times better the entire time you own it. You'll never live long enough to enjoy all of that extra longevity but, when you sell it, it'll fetch twice as much as the express (assuming the express is even worth buying by then). If you buy sh*t, then shut your yap when you have problems with it - you got what you paid for.