I just started burying coins a few weeks ago to make a test garden.
My equinox and Deus 2 struggle with 6" seated dime and 8"walker 1/2.
The equinox hits the 1/2 with great silver tone running Field 1 reactivity 4, sensitivity 20. That same setting mostly identifies the dime as iron.
I have the 9" coil on the XPD2. To hit those 2 targets in my soil I use Deep HC, reactivity 1, sensitivity 95, silencer 0, audio response 5. I reduced discrim to the max. This setting is hitting the dime better than my Nox with the setting noted above. The setting above is what I typically hunt with in non trashy environments when using the equinox. I always hunt full metal mode.
It's taking time to figure out what does and doesn't work in my hot soil.
0-4" XPD2 is great in factory presets where I live. To get more depth I'm testing out settings.