I'm curious, a lot of people have said that KULs with reds are very gritty. Is this basically the entire experience that people have had for that particular switch in that particular board? I just bought one with reds so hopefully that's not the case overall like the left alt issue with QFR browns a while ago
I think I can answer this. What you're about to read is an amateur's comparison.
I sat down and compared Filco vs. KUL, doing just about everything you can think of (switching keycaps with one another, legs up and down, typing speed test.
Here's what I found:
Key presses:The initial impression that I got was that Filco MX reds felt much smoother than KUL MX reds. Maybe you can call it gritty - I'm not sure - but the KUL is more silent and easier to type without bottoming out.
The switch feels slower in speed, which allows more control. I found a difference in gaming in games like CS:GO when I had to strafe at corners to peek. Filco in my mind felt like I was walking tightropes and the typing/gaming experience felt less grounded and secure.
Other differences: KUL key travel felt shorter (even though we know key travel can't actually be shorter).
I chalked up the reason of shorter key travel feel to the case, which is much lower profile than the Filco.
PlatesTyping on the Filco had more finger fatigue due to a harsher landing (is this due to the switches being stiffer on the KUL, which decreases the speed?). I think the typing on Filco felt smooth to reach the bottom and each bottom-out gave you a nice reminder of a thock that a solid plate was under. I found this thock a bit fatiguing, actually.
KUL's plate is silent compared to Filco's, which I preferred. It may not seem premium, if sound feedback from the plate is what you want, but the KUL is a lot quieter.