I’m still trying to decide which one to sell CTX or Equinox. Equinox tends to hit as a back and forth high/iron tone on rusty iron, so I waste time trying to decide to dig or not on rusty iron targets. The CZ21 is like this as well, so I have gotten good at it, but it still wastes time and doesn’t make you feel confident that the last target was iron or a masked target. This is why they added the Iron Bias setting, but I don’t know if I trust that setting.
I definitely dig a lot more rusty iron with the Equinox, but also dig smaller targets. So it can be a pain to hunt with the equinox in heavy rusty iron, which is the best conditions for finding gold. CTX is just a smooth running, accurate, deep beast, hard to top that.