Quest, Is that a trick question? Just kidding! LOL!! I'll offer my opinions, since no one has replied yet. I'll list what I believe to be the advantages first. First: Obviously the weight. The coil and the control box are more ergonomically friendly. Second: The ability to discriminate is much more adjustable on the F70. The CZ has iron and so on in distinct categories, which is not the optimal situation. Third: Pinpointing with the F70 is much better than the CZ, more than likely due to coil design. Fourth: The F70 has the ability to assign VDI numbers to each target, which, when used in conjunction with the sound of said target, greatly improves the ability to correctly ID an object. Fifth: The F70 has an extreme depth ability, even when compared to the CZ. Sixth: Target separation is much better, again, perhaps due to coil design. Seventh: The F70 has the option to change frequencies, if the need arises. This is a few of the advantages that I consider major. Now for the negatives; First: The F70 is not built as sturdy as the "tank" design of the CZ. Second: The F70 has no backlight, but that is no problem, really, unless you hunt at night a lot, and even then, is easily remedied. Third: The CZ is water resistant without a cover, and the F70 is not. (Again, not a problem if you don't hunt in heavy fog or light rain.) Fourth: The F70 has a verrry shiny display cover, which I've found to be quite aggravating in direct sunlight. This sums up my opinion of what I consider major disadvantages. Similarities include extremely long battery life for both, extreme depth for both, both are fairly easy to become accustomed to, (although, of course, the F70, being more adjustable to various situations, may take a little longer to adapt to), and the fact that if there is a target in the ground, and your coil goes over it, both will let you know!! Hope this helps!! Great hunting and good luck!! Regards, Richard.