I've been doing a little comparison testing lately between the new Garrett Axiom and the Minelab GPX 6000. My focus was on sensitivity to small gold, as most areas I hunt still have plenty of tiny nuggets left; if there are any large, deep pieces left, they’ll still be there for the next generation GPZ to unearth. This comparison is not scientific by any means, and was done just for my curiosity, but I've decided to share my methods and observations for anyone here that may be curious as well.