In the preview as a reward and once obtained the Cosmic Hatchet Prototype v.06 is labeled as Cosmic Pickaxe Prototype v.06. Both Cosmic Hatchet Prototype v.05 and v.07 are labeled correctly. I'm not sure if the Cosmic Pickaxe Prototype v.06 is labeled as it's Hatchet counterpart as I haven't done any progress on miner.