For me, the biggest difference has been the sewn-down pleats. They kept coming "untucked" on the Economy at the waist. Also, with less material, the pleats on the ends needed some realigning on my Econ. Easy to do, and wears much better now.

My latest pics will be up shortly (FWIW, a black Guinness t-shirt with gold lettering goes smashingly well with the Irish National from SWK).

On a related note: my wife was, shall we say, shocked when she picked me up at the airport on Friday. I think she's still processing the data. More to follow.