As thread title really: Are there two "editions" of White's M6 called either the M6 and the M6 Matrix or is it just what different people and different dealers call them?
I don't think there's any difference. Could be they realised there's been another detector called a M6 for several years (drainfinder). They don't do very well on names. With the Whites Vision/V3 all they had to do was go on e-bay and they would see the Vision was a low range Chinese detector.