Original Filco's had an undisclosed problem that effected RMA/DOA rates by a large enough margin to warrant Elite Keyboards to switch to Leopold.
Me having the WASD Keyboard is for the testing reasons and I plan to be using it all August (if I go insane from the clicks I demand a sammich for my troubles. )
People tend to think, that for some reason, Filco's had no issues; which isn't true. The Majestouch 1's had an issue that we didn't find out about till later (though it shouldn't effect those with properly functioning boards right now) and the Majestouch 2 boards have an issue where some emit a sharp ping sound.
I'm not saying Filco's are bad but saying the build quality is better just isn't a fact as there's no way to base the filco's build being better.
On tangible aspects the WASD Keyboard is better than the Filco. In terms of soldering & PCB quality they are the same but the WASD keyboard harder to take apart due to the more heavy duty body construction and it's made of a thicker plastic which also helps it.
Those are tangible aspects to judge the merit on.