Those 2 machines are not known for being iron-see-through ghost-townsy machines. ESPECIALLY not the Ace. They might be good for their individual tasks, but .... are not going to compete with specialty machines known for pulling targets out of iron beds. So the fact of your Deus out-hunting them in iron, is going to be an easy test to pass IMHO.
There's always trade offs: Machines that are known for being very deep, and having great TID's at-depth, and being good in nasty soils, TEND to be poor at iron-see-through ability. Contrast to a machine like a silver Sabre or Bandido, which has only half the depth (doing good to get 6 or 7" on a coin), and have no TID/VDI (barring scrolling up and down the disc. dial). And perhaps don't fare well in minerals. Yet they are great for pulling coins from next to, and oft-times UNDER nails.
Yeah I don't know much about the latest incarnation of the Deus, other than a friend who claims he's now pulling targets from previously cleaned out iron zones. Says it's superior to the older deus. Something to do with higher frequency now, smaller coil options (versus the original where you were stuck with a single size), etc.. We are slated to take it some ghost town sites in a few months. Will pit it against machines like the Impact, Bandido, & explorer II.
