I can't honestly answer your question, but I done a ton of reviewing between the Xterra 30 & the Tesoro Cibola before I bought a My Cibola. I had several folks say the the Xterra is prone to signaling on iron where the Cibola discriminates it out well & still finds the goodies, also froom my reviewing I came to the conclusion that the Cibola was a much better machine compared to the Xterra. But as I say I haven't ever tried a Xterra to find out for sure but I am extremely happy with my Cibola. Steve.