I have both boards with MX Reds. I like the Ducky G2 TKL, but I have to say the Filco TKL is more solid. The Cherry stabilizers on the Ducky really don't bother me very much on a keyboard with Reds, although they do make the spacebar feel very slightly heavier than the Filco. The Filco is a bit heavier and the case has basically no flex, the Ducky doesn't feel quite as tank-like solid, although it doesn't feel cheap or light either.
All that being said, they are both good boards and which to choose would depend on whether you want the Ducky's features -- the Ducky features USB NKRO, backlit WASD cluster, media keys, and a removable USB cable, while the Filco has none of those. If those are not important to you then I would go with the Filco for the better stabilizer and overall better build quality.