Just in case someone wonder how the GMK BAE fits on a board. In a programmable PCB the BAE can be easily swapped with ISO Enter.
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I'm afraid it wont fit. On the iso enter the vertical stems are at the center of the 1.25U area, while in the bae enter they are centered at the 1.5U area. :(
You would need new pcbs and plates.
edit: though gmk might have different stabilizer setups for this key, maybe worth asking. ANSI stabs and top key would be the most compatible.
I agree that the stems positions of the mold intended to be used should be checked.
For the record, both pictures are Cherry made boards and key caps, therefore, it is very likely that the mold available at GMK is the same. Personally, I would prefer this same design, because it fits over an standard ISO layout, which most contemporary PCBs fit, even Steel series boards have the same layout and in general, it seems that this layout is the most common, in the other hand, I do not see what PCBs or keyboards would take something like the bottom picture and it seems that it would have more mechanical interferences due to the large hollow stem.
Cherry key cap
Cherry board that takes Cherry key cap
Steel board that takes Cherry key cap
Other design, that I do not know what board can take