I just got my hands on some silent box browns today, and there are at least a couple things I find really interesting.
1.) They are noticeably more tactile than regular box browns, which appears to be a conscious choice on the part of Kaihua. The reason for the higher tactility is a different leaf in the “box”. The bottom housings are the same as and interchangeable with those of regular box switches - and even though the top half of the stem is a different shape, the bottom half fits right in with other box bottom housings. So - when you put the top half of a silent box brown onto the bottom housing of a regular box brown, they feel a lot more similar.
2.) The top-housings have a different profile than most other mx-compatible switches, and at first glance it looks like this would eliminate the concern of north-facing switches vs Cherry profile / GMK caps. I’ll come back with some more definitive results soon, but this seems like a fantastic adaptation for a silent switch - as the ticking against the housing of north-facing silent switches is exactly what stopped me from using GMK sets on a couple of my boards.