As a coin detector, the X70 is the better detector as far as I'm concerned. With the MXT I was always watching the screen, while the X70 can give a really good ID using the 99 tone mode. The concurrent depth display is also nice and saves having to go into PP mode to get a depth reading. Switching modes is also a lot easier and the notch disc. is more versatile. Coil selection IS better with the MXT but really, how many coils does a person need? I think that the MXT has a slightly better AM mode with the Vsat, but the X70 has an adjustable iron mask. True, you can push the trigger forward with the MXT to get the iron 'tone ID' working, but in heavy iron trash (and some hotrocks) it will incessantly grunt like a sick hog and be just as annoying. Supposedly, the X70 handles saltwater beaches better and being able to change the operating frequency is nice. The X70 also offers more tweaks (bells and whistles), which makes it a somewhat more adjustable unit. ..Willy.