These are not AMD they are all NVIDIA. AMD didn't confirm on making any mining GPUs.
They're not MADE by AMD. They're made by Sapphire, and essentially strips down on a lot of connectors and fancy RGB stuff and directs the vent fins to the back exhaust etc. All to create a lower cost, "purely made for mining" card.
It's Sapphire jumping on the bandwagon.
Now, if it turns out Vega is brutal at ETH, then watch craigslist get flooded with 470/480/570/580 cards.