can very very, very similar.
The M6 is derived from using the basic MXT circuitry, making it 'simple-to-use,' and adding a 7-Tone audio ID (which some find useful for coin and jewelry hunting).
If you set the MXT in Coin & Jewelry mode, center trigger, and use the same Discriminate setting as an M6, and set the Gain/Sensitivity controls to a similar setting, and ground balance both over the same spot, and use the same coils, and then reduce the MXT's tuner to a level
just slightly below an audible threshold hum, you're going to have virtually identical performance.
The M6 eliminates some extra trigger toggle assignments and the Prospecting mode of the MXT which honestly confuses a lot of people.
I wish the M6 retailed for $649.85 and came standard with the 5.3 Eclipse coil because that would put a little more difference in price between the two, making the M6 more attractive to new shoppers, AND it would supply a great coin-shooting unit with an excellent coin-shooting coil!
Monte