Blazer,
The Wingmaster is basically the same as the express except the quality is much greater. Better steel, action and stock finish.
I have both. I have an old Wingmaster from the 70s which I use for trap and pheasants. I have an Express I use for Turkey hunting. My theory was I wouldn't mind banging up the Express. They are much less expensive and if you handle both side by side you'll see why.
The Express is still a functional gun but not as purty.