I feel like there are some variations with mx blue batches, even with the same keyboards. I remember reading a post complaining about mushy blues on their blackwidow, while their brother's blackwidow was much more crisper. I think that over time, the blue switches start to get a bit more quieter.
I have owned two mx blue keyboards, a Poker 2 and a Noppoo Choc Mini. I loved how crisp the Poker 2 sounded while my Noppoo just sounded all old and worn out. The Poker 2 is much higher quality imo, it has very solid construction and lacks the wobbliness/creakiness of the Noppoo case. My friend's QFR with blues sounds and feels extremely crisp.
I think what happens though, is that keyboards with thinner, abs keycaps tend to have a clickier, high pitched sound. Thick PBT or POM can make the same click sounds, but they have a nicer, deeper thock when the keycap bottoms out.
If you put a mat underneath your keyboard, it is most likely going to sound more muted as well. The bottom out sound will be softer so the clicks may sound louder in comparison.
One more thing to my rambling comment: videos are probably not ideal when comparing keyboard sounds. Microphones may capture only the higher pitched sounds and that's what makes it sound "crisper" in the video while in reality, it may not sound like that at all.