Okay, my XD87 with what should be ART BOX Brown switches arrived today:
You can see that the stabs are matched to the Tai Hao Pulse keycaps:
[This was unintentional, but awesome.]
You’ll notice that the Caps Lock key is crooked. I’m not sure if this is BOX being BOX, or if the Tai Hao stem is misaligned. Then again, it could be the board design, as that Caps Lock area looks strange.
With regard to the ART BOX Brown, I did not have the opportunity to test them before the build. They are clearly BOX Browns, and emulate its characteristics. The word “Kailh” is embedded in the side of the upper housing, IIRC.
One difference that I would note is that the ART BOX Browns appear to be a little grittier / sandier than regular BOX Browns. I have a batch of regular BOX Browns from Novelkeys in hotswap, and I would say that those are smoother. Both versions of the switch are very crisp, crisper than Cherry Brown. But I think the ART BOX may have some Cherry-like sandiness.
One thing I would note is that the Art BOX Browns crash down pretty hard on the XD87’s metal plate. It seems harsher than usual. I’m not pressing hard or anything, but these switches do slam. You might want to think about that before putting BOX switches in an XD87.