These have that 'G86'-look to the keys, which they call ATK, but essentially the tops are 20% larger than average and are usually found on the desktop Cymotion boards, as well as some POS boards. They are just rubber dome, but quite nice rubber domes at that (albeit cheap).
I think it's safe to assume that all G86 are rubber dome unless stated otherwise. I wonder if those earlier boards that turned up on eBay were a special order of some sort - really G80-series boards but with a G86 sticker applied for whatever reason.