Can't say anything about the Mossberg.
My gunsmith told me the 870 Express is cheap for a reason. Doesn't have the same quality of parts as the Wingmaster.
+1 on the Wingmaster vs Express. A older Wingmaster even more so.
Mine is a ISP (Indiana State Patrol), top folder, 2 3/4", trade in that I guess is from the early 80's. IDK, it was from a SGN ad in the late 80's, early 90's.
Nice, but getting older I'd like something with a real stock and lighter. The 870, 20ga, Deer special (20" bbl, rifle sights), is looking good, but scarce+not cheap. The PG on mine is getting less and less appealing as I get older and the folding (metal) stock is only good for bracing against your hip.
Wet