I have a Filco (mx black) and Leopold (mx red) and really the only difference I've noticed, aside from the switch differences, is the stabilizers. Something that was addressed in your first thread back in October. Granted it's only on 5 keys; backspace, enter, shift and the spacebar, but those are keys that you will use often. Without the ability to compare to each other I'm not sure you will even know the difference though.