IMHO,
*Coin hunting where there's modern trash, edge goes to the Equinox.
*Relic hunting older sites with lots of iron, edge goes to the Deus.
*Water hunting or swinging in the rain (most versatile), Nox
*Best target audio nuances, Deus.
*Build quality, Deus.
*Slight weight advantage, Deus.
*Most compact and easiest to transport, Deus.
*Ergonomics is subjective. I prefer a straight shaft mounted in the center of the coil, so Nox gets the nod for me.
*Least susceptible to EMI, Nox.
*Easier learning curve, Nox.
*Easier on the wallet, Nox.