space topres?
topres with alps click (or if you can feel it, like a older ballpoint pen click mechanism?). Seriously I have brown/black/blue/white/clear mx, white/black/blue/pink/salmon alps, & model m keyboard/switches. Invaders feel like none. Check the fujitsu.
My only explanation is since the casing is the slide, it feels much more stable, and there is not much of a hollow resonance effect and may be the materials are softer than cherry/alps, so no prominent click/clacks. Overall feels good.Only bad is the keycap-flying effect
I am also waiting to find the answer. I have only the black invaders.