Both keyboards arrived today. I don't know yet which keys i like more. In terms of construction the HPE87 wins easily, the switches are plate mounted on and the keyboard itself has a nice quality to it. It also comes with some gimmicks like additional esc, f12, wasd and arrow keys.
The cherry feels much cheaper in terms of plastic used, the switches are pcb mounted and I think the combination of the PCB mounting and the cheap plastic make the keyboard louder. The keys kinda echo if they are bottomed out.
The keycaps themselves feel slightly better on the cherry (PBT plate printed i think) then on the HPE (ABS). Both are nice though.
I am also thinking about modding some of the clears into ergos and pandas and trying those.
BTW, the HPE came from qtan's ebay shop, shipped the next day, arrived in 4 days with DHL. AWESOME.