Where'd you find the switches? And do you think they are any smoother than vintage blacks?
I harvested them from an 1800 built by another user a while back, who I assume got them from one of those Ascaii PCBs from like two years ago.
Some in my batch are smoother than most switches I've ever used. But overall, no, I wouldn't definitively say they're smoother than all vintage blacks. That's only my opinion though - I'm sure others who have used them would quickly disagree. I'm not ashamed to admit that I just think Nixdorf switches are cool to have.
I always found smoothness comparisons to be pretty nebulous anyway, just due to all of the factors that make any single given switch feel the way it does. That, or my sensation of touch isn't as refined as others'.