My wife has an XLT and I have a DFX. After 2 years I do have an edge in good finds over her XLT. I also put in a bit more time and really try to "learn" my machine. I think that is the difference and not the machines. I know the DFX has dual frequencies and other bells and whistles. The main reason I bought myself the DFX was due to a response I got to this same question on here. Someone, I wish I could give credit where due, but I forget the name, told me that if I did not buy the DFX I would always wonder if I should have. That is sooo true. Anyways, My wife and I have been thrilled with both machines. Hope this helps a little. HH dave.